US20080214651A1 - Crystalline forms of [R-(R*, R*)]-2-(4-fluorophenyl)-beta,delta-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1) - Google Patents

Crystalline forms of [R-(R*, R*)]-2-(4-fluorophenyl)-beta,delta-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1) Download PDF

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US20080214651A1
US20080214651A1 US11/977,459 US97745907A US2008214651A1 US 20080214651 A1 US20080214651 A1 US 20080214651A1 US 97745907 A US97745907 A US 97745907A US 2008214651 A1 US2008214651 A1 US 2008214651A1
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atorvastatin
broad
crystalline form
crystalline
diffractometer
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Stephen Robert Byrn
David Andrew Coates
Karen Sue Gushurst
Joseph Francis Krzyzaniak
Zheng Jane Li
Henry Grant Morrison
Aeri Park
Petinka Ivanova Vlahova
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Pfizer Inc
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/401—Proline; Derivatives thereof, e.g. captopril
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
    • A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/06—Antihyperlipidemics
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
    • C07D207/34—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms

Definitions

  • the present invention relates to novel crystalline forms of atorvastatin which is known by the chemical name [R—(R*,R*)]-2-(4-fluorophenyl)- ⁇ , ⁇ -dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid hemi calcium salt useful as pharmaceutical agents, to methods for their production and isolation, to pharmaceutical compositions which include these compounds and a pharmaceutically acceptable carrier, as well as methods of using such compositions to treat subjects, including human subjects, suffering from hyperlipidemia, hypercholesterolemia, osteoporosis, and Alzheimer's disease.
  • HMG-CoA 3-hydroxy-3-methylglutaryl-coenzyme A
  • mevalonate is an early and rate-limiting step in the cholesterol biosynthetic pathway. This step is catalyzed by the enzyme HMG-CoA reductase.
  • Statins inhibit HMG-CoA reductase from catalyzing this conversion. As such, statins are collectively potent lipid lowering agents.
  • Atorvastatin calcium disclosed in U.S. Pat. No. 5,273,995, which is incorporated herein by reference, is currently sold as Lipitor® having the chemical name [R—(R*,R*)]-2-(4-fluorophenyl)- ⁇ , ⁇ -dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1) trihydrate and the formula
  • Atorvastatin calcium is a selective, competitive inhibitor of HMG-CoA reductase.
  • atorvastatin calcium is a potent lipid lowering compound and is thus useful as a hypolipidemic and/or hypocholesterolemic agent.
  • U.S. Pat. No. 5,273,995 discloses the enantiomer having the R form of the ring-opened acid of trans-5-(4-fluorophenyl)-2-(1-methylethyl)-N, 4-diphenyl-1-[(2-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide, ie, [R—(R*,R*)]-2-(4-fluorophenyl)- ⁇ , ⁇ -dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)-carbonyl]-1H-pyrrole-1-heptanoic acid which is atorvastatin.
  • Atorvastatin is prepared as its calcium salt, ie, [R—(R*,R*)]-2-(4-fluorophenyl)- ⁇ , ⁇ -dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1).
  • the calcium salt is desirable since it enables atorvastatin to be conveniently formulated in, for example, tablets, capsules, lozenges, powders, and the like for oral administration. Additionally, there is a need to produce atorvastatin in a pure and crystalline form to enable formulations to meet exacting pharmaceutical requirements and specifications.
  • atorvastatin is produced needs to be one which is amenable to large-scale production. Additionally, it is desirable that the product should be in a form that is readily filterable and easily dried. Finally, it is economically desirable that the product be stable for extended periods of time without the need for specialized storage conditions.
  • the present invention provides atorvastatin in new crystalline forms designated Forms V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, and XIX.
  • the new crystalline forms of atorvastatin are purer, more stable, or have advantageous manufacturing properties than the amorphous product.
  • the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • Relative Intensity 2 ⁇ (>10%) a 4.9 (broad) 9 6.0 15 7.0 100 8.0 (broad) 20 8.6 57 9.9 22 16.6 42 19.0 27 21.1 35 a Relative intensity of 4.9 (broad) 2 ⁇ is 9.
  • the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following solid-state 13 C nuclear magnetic resonance (ssNMR) spectrum wherein chemical shift is expressed in parts per million:
  • the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm ⁇ 1 :
  • crystalline Form V atorvastatin is a trihydrate.
  • the present invention is directed to crystalline Form VI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • Relative Intensity 2 ⁇ (>10%) a 7.2 11 8.3 77 11.0 20 12.4 11 13.8 9 16.8 14 18.5 100 19.7 (broad) 22 20.9 14 25.0 (broad) 15 a Relative intensity of 13.8 (broad) 2 ⁇ is 9.
  • the present invention is directed to crystalline Form VI atorvastatin and hydrates thereof characterized by the following solid-state 13 C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following solid-state 13 C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm ⁇ 1 :
  • crystalline Form VII atorvastatin is a sesquihydrate.
  • the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • Relative Intensity 2 ⁇ (>10%) a 7.5 61 9.2 29 10.0 16 12.1 10 12.8 6 13.8 4 15.1 13 16.7 (broad) 64 18.6 (broad) 100 20.3 (broad) 79 21.2 24 21.9 30 22.4 19 25.8 33 26.5 20 27.4 (broad) 38 30.5 20 a Relative intensity of 12.8 2 ⁇ is 6 and 13.8 2 ⁇ is 4.
  • the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following solid-state 13 C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm ⁇ 1 :
  • crystalline Form VIII atorvastatin is a dihydrate.
  • the present invention is directed to crystalline Form IX atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form X atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form X atorvastatin and hydrates thereof characterized by the following solid-state 13 C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • the present invention is directed crystalline Form X atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm ⁇ 1 :
  • crystalline Form X atorvastatin is a trihydrate.
  • the present invention is directed to crystalline Form XI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • Relative Intensity 2 ⁇ (>10%) a 5.4 11 7.7 24 8.0 25 8.6 42 8.9 25 9.9 36 10.4 (broad) 24 12.5 18 13.9 (broad) 9 16.2 10 17.8 70 19.4 100 20.8 51 21.7 13 22.4-22.6 (broad) 18 24.3 19 25.5 24 26.2 11 27.1 8 a Relative intensity of 13.9 (broad) 2 ⁇ is 9 and 27.1 2 ⁇ is 8.
  • the present invention is directed crystalline Form XII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm ⁇ 1 :
  • the present invention is directed to crystalline Form XIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XIV atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XV atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XVI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline 5 Form XVII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XVIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the present invention is directed to crystalline Form XIX atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2 ⁇ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuK ⁇ radiation:
  • the novel crystalline forms of atorvastatin are useful hypolipidemic and hypocholesterolemic agents as well as agents in the treatment of osteoporosis and Alzheimer's disease.
  • a still further embodiment of the present invention is a pharmaceutical composition for administering an effective amount of crystalline Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, or Form XIX atorvastatin in unit dosage form in the treatment methods mentioned above.
  • the present invention is directed to methods for production of Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, or Form XIX atorvastatin.
  • FIG. 1 A first figure.
  • Solid-state 13 C nuclear magnetic resonance spectrum of Form X atorvastatin Solid-state 13 C nuclear magnetic resonance spectrum of Form X atorvastatin.
  • Crystalline Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, and Form XIX atorvastatin may be characterized by their X-ray powder diffraction patterns, by their solid state nuclear magnetic resonance spectra (NMR), and/or their Raman spectra.
  • Forms V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, or XIX atorvastatin were characterized by their X-ray powder diffraction pattern.
  • the X-ray diffraction patterns of Forms V, VI, VII, VIII, IX, X, XI, XII, or Form XIII atorvastatin were carried out on a Shimadzu XRD-6000 X-ray powder diffractometer using CuK ⁇ radiation. The instrument is equipped with a fine-focus X-ray tube.
  • the tube voltage and amperage were set at 40 kV and 40 mA, respectively.
  • the divergence and scattering slits were set at 10, and the receiving slit was set at 0.15 mm.
  • Diffracted radiation was detected by a NaI scintillation detector.
  • a theta-two theta continuous scan at 3°/min (0.4 sec/0.02° step) from 2.5 to 40° 2 ⁇ was used.
  • a silicon standard was analyzed each day to check the instrument alignment.
  • X-ray diffraction patterns of Forms XIV, XV, XVI, XVII, XVIII, and XIX were carried out on a Bruker D5000 diffractometer using copper radiation, fixed slits (1.0, 1.0, 0.6 mm), and a Kevex solid state detector. Data was collected from 3.0 to 40.0 degrees in 2 ⁇ using a step size of 0.04 degrees and a step time of 1.0 seconds. It should be noted that Bruker Instruments purchased Siemans; thus, a Bruker D 5000 instrument is essentially the same as a Siemans D 5000.
  • the X-ray diffraction patterns of Forms V, VI, VII, VIII, IX, X, XII, XVI, and XVIII were also carried out on an Inel diffractometer.
  • X-ray diffraction analyses were carried out on an Inel XRG-3000 diffractometer, equipped with a Curved Position Sensitive (CPS) detector with a 2 ⁇ range of 120 degrees.
  • Real time data were collected using CuK ⁇ radiation starting at approximately 4° 2 ⁇ at a resolution of 0.03° 2 ⁇ .
  • the tube voltage and amperage were set to 40 kV and 30 mA, respectively. Samples were prepared for analysis by packing them into thin-walled glass capillaries.
  • Each capillary was mounted onto a goniometer head that is motorized to permit spinning of the capillary during data acquisition. Instrument calibration was performed daily using a silicon reference standard. The Inel diffractograms for the available forms are shown in the figures without baseline subtraction. Calculating the intensities from these diffractograms is within the skill of the art and involves using baseline subtraction to account for background scattering (e.g., scattering from the capillary).
  • the sample is typically placed into a holder which has a cavity.
  • the sample powder is pressed by a glass slide or equivalent to ensure a random surface and proper sample height.
  • the sample holder is then placed into the instrument (Shimadzu or Bruker).
  • the source of the X-ray beam is positioned over the sample, initially at a small angle relative to the plane of the holder, and moved through an arc that continuously increases the angle between the incident beam and the plane of the holder.
  • Measurement differences associated with such X-ray powder analyses result from a variety of factors including: (a) errors in sample preparation (e.g., sample height), (b) instrument errors (e.g., flat sample errors), (c) calibration errors, (d) operator errors (including those errors present when determining the peak locations), and (e) preferred orientation. Calibration errors and sample height errors often result in a shift of all the peaks in the same direction and by the same amount. Small differences in sample height on a flat holder lead to large displacements in XRPD peak positions.
  • the peak locations from the Inel measurements are typically more accurate than those from the Shimadzu or the Bruker instrument.
  • this correction factor will bring the peak positions from the Shimadzu and Bruker into agreement with the Inel and will be in the range of 0 to 0.2° 2 ⁇ .
  • Table 1 lists the 2 ⁇ and relative intensities of all lines in the sample with a relative intensity of >10% for crystalline Forms V-XIX atorvastatin. The numbers listed in this table are rounded numbers.
  • each form can be identified and distinguished from the other crystalline forms by either a combination of lines or a pattern that is different from the X-ray powder diffraction of the other forms.
  • Table 2 lists combination of 2 ⁇ peaks for Forms V to XIX atorvastatin, i.e., a set of X-ray diffraction lines that are unique to each form.
  • Forms I to IV atorvastatin disclosed in U.S. Pat. Nos. 5,969,156 and 6,121,461 are included for comparison.
  • Solid-state 13 C NMR spectra were obtained at 270 or 360 MHz Tecmag instruments.
  • High-power proton decoupling and cross-polarization with magic-angle spinning at approximately 4.7 and 4.2 kHz or 4.6 and 4.0 kHz were used for 68 MHz ( 13 C frequency) data acquisition, 4.9 and 4.4 kHz were used for 91 MHz ( 13 C frequency) data acquisition.
  • the magic angle was adjusted using the Br signal of KBr by detecting the side bands.
  • a sample was packed into a 7 mm Doty rotor and used for each experiment.
  • the chemical shifts were referenced externally to adamantine except for Form X where the chemical shifts are arbitrary.
  • Table 3 shows the solid-state NMR spectrum for crystalline Forms V, VI, VII, VIII, and X atorvastatin.
  • Table 4 shows unique solid-state NMR peaks for Forms V, VI, VII, VIII and X atorvastatin, ie, peaks within ⁇ 1.0 ppm. Forms I to IV atorvastatin are included for comparison.
  • the Raman spectrum was obtained on a Raman accessory interfaced to a Nicolet Magna 860 Fourier transform infrared spectrometer.
  • the accessory utilizes an excitation wavelength of 1064 nm and approximately 0.45 W of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser power.
  • the spectrum represents 64 or 128 co-added scans acquired at 4 cm ⁇ 1 resolution.
  • the sample was prepared for analysis by placing a portion into a 5-mm diameter glass tube and positioning this tube in the spectrometer.
  • the spectrometer was calibrated (wavelength) with sulfur and cyclohexane at the time of use.
  • Table 5 shows the Raman spectra for Forms V, VI, VII, VIII, X, and XII atorvastatin.
  • Table 6 lists unique Raman peaks for Forms V, VI, VII, VIII, X, and XII atorvastatin, ie, only one other form has a peak with ⁇ 4 cm ⁇ 1 . In the case of Forms VI and X, it is a unique combination of peaks. Forms I to IV atorvastatin are included for comparison.
  • Crystalline Forms V to XIX atorvastatin of the present invention may exist in anhydrous forms as well as hydrated and solvated forms. In general, the hydrated forms are equivalent to unhydrated forms and are intended to be encompassed within the scope of the present invention.
  • Crystalline Form XIV contains about 6 mol of water. Preferably, Form XIV contains 6 mol of water.
  • Crystalline Forms V, X, and XV atorvastatin contain about 3 mol of water. Preferably, Forms V, X, and XV atorvastatin contain 3 mol of water.
  • Crystalline Form VII contains about 1.5 mol of water.
  • Form VII atorvastatin contains 1.5 mol of water.
  • Crystalline Form VIII contains about 2 mol of water.
  • Form VIII atorvastatin contains 2 mol of water.
  • Crystalline Forms XVI-XIX may exist as a solvate.
  • Crystalline forms of atorvastatin of the present invention regardless of the extent of hydration and/or salvation having equivalent x-ray powder diffractograms, ssNMR, or Raman spectra are within the scope of the present invention.
  • Crystalline forms in general, can have advantageous properties.
  • a polymorph, solvate, or hydrate is defined by its crystal structure and properties.
  • the crystal structure can be obtained from X-ray data or approximated from other data. The properties are determined by testing.
  • the chemical formula and chemical structure does not describe or suggest the crystal structure of any particular polymorphic or crystalline hydrate form.
  • a chemical compound can exist in three states-solid, solution, and gas-crystalline solid forms exist only in the solid state. Once a chemical compound is dissolved or melted, the crystalline solid form is destroyed and no longer exists (Wells J. I., Aulton M. E. Pharmaceutics. The ‘Science of Dosage Form Design. Reformulation , Aulton M. E. ed., Churchill Livingstone, 1988; 13:237).
  • Form VII has good chemical stability, which is comparable to Form I (disclosed in U.S. Pat. No. 5,969,156). Since noncrystalline forms of atorvastatin are not chemically stable, this is a significant advantage, which would translate into enhanced shelf life and longer expiration dating.
  • Form VII can be prepared from acetone/water, whereas Form I is prepared from the more toxic methanol/water system.
  • Form VII is the sesquihydrate and contains less water, meaning that a unit weight of Form VII contains more atorvastatin molecules, meaning it is of higher potency.
  • BFI Brittle Fracture Index
  • Form VIII also has less water than Form I (dihydrate vs trihydrate) and thus a gram of Form VIII contains more atorvastatin molecules.
  • Form X is advantageous in that it can be prepared from the less toxic isopropanol (IPA):water system, thus avoiding the more toxic methanol:water system.
  • IPA isopropanol
  • Form XII has the highest melting point (210.6). Since high melting point correlates with stability at high temperature, this means this form is most stable at temperatures near the melting point. High melting forms can be advantageous when process methods involving high temperatures are used. Form XII is also prepared from the less toxic tetrahydrofuran (THF) water system.
  • THF tetrahydrofuran
  • Form XIV is prepared using the less toxic THF/water system.
  • the present invention provides a process for the preparation of crystalline Forms V to XIX atorvastatin which comprises crystallizing atorvastatin from a solution in solvents under conditions which yield crystalline Forms V to XIX atorvastatin.
  • the compounds of the present invention can be prepared and administered in a wide variety of oral and parenteral dosage forms.
  • the compounds of the present invention can be administered by injection, that is, intravenously, intramuscularly, intracutaneously, subcutaneously, intraduodenally, or intraperitoneally.
  • the compounds of the present invention can be administered by inhalation, for example, intranasally.
  • the compounds of the present invention can be administered transdermally. It will be obvious to those skilled in the art that the following dosage forms may comprise as the active component, either compounds or a corresponding pharmaceutically acceptable salt of a compound of the present invention.
  • pharmaceutically acceptable carriers can be either solid or liquid.
  • Solid form preparations include powders, tablets, pills, capsules, cachets, suppositories, and dispersible granules.
  • a solid carrier can be one or more substances which may also act as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders, preservatives, tablet disintegrating agents, or an encapsulating material.
  • the carrier is a finely divided solid which is in a mixture with the finely divided active component.
  • the active component is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
  • the powders and tablets preferably contain from two or ten to about seventy percent of the active compound.
  • Suitable carriers are magnesium carbonate, magnesium stearate, talc, sugar, lactose, pectin, dextrin, starch, gelatin, tragacanth, methylcellulose, sodium carboxymethylcellulose, a low melting wax, cocoa butter, and the like.
  • the term “preparation” is intended to include the formulation of the active compound with encapsulating material as a carrier providing a capsule in which the active component, with or without other carriers, is surrounded by a carrier, which is thus in association with it.
  • cachets and lozenges are included. Tablets, powders, capsules, pills, cachets, and lozenges can be used as solid dosage forms suitable for oral administration.
  • a low melting wax such as a mixture of fatty acid glycerides or cocoa butter
  • the active component is dispersed homogeneously therein, as by stirring.
  • the molten homogenous mixture is then poured into convenient sized molds, allowed to cool, and thereby to solidify.
  • Liquid form preparations include solutions, suspensions, retention enemas, and emulsions, for example water or water propylene glycol solutions.
  • liquid preparations can be formulated in solution in aqueous polyethylene glycol solution.
  • Aqueous solutions suitable for oral use can be prepared by dissolving the active component in water and adding suitable colorants, flavors, stabilizing, and thickening agents as desired.
  • Aqueous suspensions suitable for oral use can be made by dispersing the finely divided active component in water with viscous material, such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethylcellulose, and other well-known suspending agents.
  • viscous material such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethylcellulose, and other well-known suspending agents.
  • solid form preparations which are intended to be converted, shortly before use, to liquid form preparations for oral administration.
  • liquid forms include solutions, suspensions, and emulsions.
  • These preparations may contain, in addition to the active component, colorants, flavors, stabilizers, buffers, artificial and natural sweeteners, dispersants, thickeners, solubilizing agents, and the like.
  • the pharmaceutical preparation is preferably in unit dosage form.
  • the preparation is subdivided into unit doses containing appropriate quantities of the active component.
  • the unit dosage form can be a packaged preparation, the package containing discrete quantities of preparation, such as packeted tablets, capsules, and powders in vials or ampoules.
  • the unit dosage form can be a capsule, tablet, cachet, or lozenge itself, or it can be the appropriate number of any of these in packaged form.
  • the quantity of active component in a unit dose preparation may be varied or adjusted from 0.5 mg to 100 mg, preferably 2.5 mg to 80 mg according to the particular application and the potency of the active component.
  • the composition can, if desired, also contain other compatible therapeutic agents.
  • the crystalline Forms V to XIX atorvastatin utilized in the pharmaceutical method of this invention are administered at the initial dosage of about 2.5 mg to about 80 mg daily.
  • a daily dose range of about 2.5 mg to about 2 ⁇ mg is preferred.
  • the dosages may be varied depending upon the requirements of the patient, the severity of the condition being treated, and the compound being employed. Determination of the proper dosage for a particular situation is within the skill of the art. Generally, treatment is initiated with smaller dosages which are less than the optimum dose of the compound. Thereafter, the dosage is increased by small increments until the optimum effect under the circumstance is reached. For convenience, the total daily dosage may be divided and administered in portions during the day if desired.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was slurried in a mixture of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was slurried in a mixture of acetonitrile/water (9:1) at 60° C. overnight, filtered, and air dried to afford crystalline Form V atorvastatin.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was stressed under vapors of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
  • Acetonitrile was added to a solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in tetrahydrofuran/water (9:1) and cooled to afford crystalline Form V atorvastatin.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) diffused in a vapor of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was placed into a vapor jar containing dimethylformamide/water (9:1) for 20 days to afford crystalline Form VI atorvastatin.
  • a slurry of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in isopropanol/water (9:1) was stirred for a few days, filtered, and air dried to afford crystalline Form X atorvastatin.
  • a slurry of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in isopropanol/water (9:1) was stirred for 5 days, filtered, and air dried to afford crystalline Form X atorvastatin.
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was slurried in tetrahydrofuran/water (2:8) at 90° C. for 5 days, filtered, and air dried to afford crystalline Form XII atorvastatin.
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was added to 10 mL 2:8 water:methanol to leave a layer of solid on the bottom of a vial. The slurry was heated to about 70° C. for 5 days. The supernatant was removed, and the solid air dried to afford crystalline Form XIII atorvastatin.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for 3 weeks in 45 mL of isopropyl alcohol/5 mL of water (9:1) at ambient temperature. The mixture was filtered to afford crystalline Form XIV atorvastatin after drying at ambient temperature.
  • DSC Differential scanning calorimetry
  • peak indicates a low desolvation event at about 60° C. (peak) followed by a melt at about 150° C.
  • Combustion analysis indicates that the compound is a hexahydrate.
  • Thermographic infrared spectroscopy (TG-1R) shows the compound contains water.
  • Karl Fischer shows the compound contains 5.8% water.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for 3 weeks in 45 mL acetonitrile/5 mL of water (9:1) at ambient temperature. The mixture was filtered to afford crystalline Form XV atorvastatin after drying at ambient temperature. DSC indicates a low desolvation event at about 78° C. (peak) followed by a melt at about 165° C. Combustion analysis indicates that the compound is a trihydrate. TG-1R shows the compound contains water.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for about 1 day in 9:1 acetonitrile/water at room temperature. The mixture was filtered to afford crystalline Form XVI atorvastatin after drying at ambient temperature.
  • DSC indicates a broad endotherm at peak temperature of 72° C. and an endotherm with onset temperature of 164° C.
  • the weight loss profile by thermographic analysis (TGA) indicates a total weight loss of about 7% at 30° C. to 160° C.
  • Combustion analysis indicates that TGA and Karl Fischer analysis (shows 7.1% water) indicates the compound is a tetrahydrate/acetonitrile solvate.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 0.5 g, was slurried for about 2 days in 5 mL of 9:1 dimethylformamide (DMF)/water containing 25 mL of acetonitrile at room temperature. The mixture was filtered to afford crystalline Form XVII atorvastatin after drying at ambient temperature. DSC showed multiple broad endotherms indicating the compound was a solvate.
  • Crystalline Form XVI atorvastatin 0.5 g was dried for about 1 day at room temperature to afford crystalline Form XVIII atorvastatin.
  • DSC showed a broad endotherm at low temperature indicating the compound was a solvate.
  • Karl Fischer analysis showed the compound contained 4.4% water.
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 0.4 g, was slurried for about 7 days in 4 mL methyl ethyl ketone at room temperature. The mixture was filtered to afford crystalline Form XIX atorvastatin after drying at ambient temperature. DSC indicated a low desolvation event at about 50° C. (peak) followed by a melt at about 125° C. TGA analysis indicates that the compound is a solvate that desolvates at low temperature.

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Abstract

Novel crystalline forms of [R—(R*,R*)]-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid hemi calcium salt designated Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, and Form XIX are characterized by their X-ray powder diffraction, solid-state NMR, and/or Raman spectroscopy are described, as well as methods for the preparation and pharmaceutical composition of the same, which are useful as agents for treating hyperlipidemia, hypercholesterolemia, osteoporosis, and Alzheimer's disease.

Description

    FIELD OF THE INVENTION
  • The present invention relates to novel crystalline forms of atorvastatin which is known by the chemical name [R—(R*,R*)]-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid hemi calcium salt useful as pharmaceutical agents, to methods for their production and isolation, to pharmaceutical compositions which include these compounds and a pharmaceutically acceptable carrier, as well as methods of using such compositions to treat subjects, including human subjects, suffering from hyperlipidemia, hypercholesterolemia, osteoporosis, and Alzheimer's disease.
    • BACKGROUND OF THE INVENTION
  • The conversion of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) to mevalonate is an early and rate-limiting step in the cholesterol biosynthetic pathway. This step is catalyzed by the enzyme HMG-CoA reductase. Statins inhibit HMG-CoA reductase from catalyzing this conversion. As such, statins are collectively potent lipid lowering agents.
  • Atorvastatin calcium, disclosed in U.S. Pat. No. 5,273,995, which is incorporated herein by reference, is currently sold as Lipitor® having the chemical name [R—(R*,R*)]-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1) trihydrate and the formula
  • Figure US20080214651A1-20080904-C00001
  • Atorvastatin calcium is a selective, competitive inhibitor of HMG-CoA reductase. As such, atorvastatin calcium is a potent lipid lowering compound and is thus useful as a hypolipidemic and/or hypocholesterolemic agent.
  • U.S. Pat. No. 4,681,893, which is incorporated herein by reference, discloses certain trans-6-[2-(3- or 4-carboxamido-substituted-pyrrol-1-yl)alkyl]-4-hydroxy-pyran-2-ones including trans (±)-5-(4-fluorophenyl)-2-(1-methylethyl)-N, 4-diphenyl-1-[(2-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide.
  • U.S. Pat. No. 5,273,995, which is herein incorporated by reference, discloses the enantiomer having the R form of the ring-opened acid of trans-5-(4-fluorophenyl)-2-(1-methylethyl)-N, 4-diphenyl-1-[(2-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide, ie, [R—(R*,R*)]-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)-carbonyl]-1H-pyrrole-1-heptanoic acid which is atorvastatin.
  • U.S. Pat. Nos. 5,003,080; 5,097,045; 5,103,024; 5,124,482; 5,149,837; 5,155,251; 5,216,174; 5,245,047; 5,248,793; 5,280,126; 5,397,792; 5,342,952; 5,298,627; 5,446,054; 5,470,981; 5,489,690; 5,489,691; 5,510,488; 5,998,633; and 6,087,511, which are herein incorporated by reference, disclose various processes and key intermediates for preparing amorphous atorvastatin. Amorphous atorvastatin has unsuitable filtration and drying characteristics for large-scale production and must be protected from heat, light, oxygen, and moisture.
  • Crystalline forms of atorvastatin calcium are disclosed in U.S. Pat. Nos. 5,969,156 and 6,121,461 which are herein incorporated by reference.
  • International Published Patent Application Number WO 01/36384 allegedly discloses a polymorphic form of atorvastatin calcium.
  • Stable oral formulations of atorvastatin calcium are disclosed in U.S. Pat. Nos. 5,686,104 and 6,126,971.
  • Atorvastatin is prepared as its calcium salt, ie, [R—(R*,R*)]-2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1). The calcium salt is desirable since it enables atorvastatin to be conveniently formulated in, for example, tablets, capsules, lozenges, powders, and the like for oral administration. Additionally, there is a need to produce atorvastatin in a pure and crystalline form to enable formulations to meet exacting pharmaceutical requirements and specifications.
  • Furthermore, the process by which atorvastatin is produced needs to be one which is amenable to large-scale production. Additionally, it is desirable that the product should be in a form that is readily filterable and easily dried. Finally, it is economically desirable that the product be stable for extended periods of time without the need for specialized storage conditions.
  • We have now surprisingly and unexpectedly found novel crystalline forms of atorvastatin. Thus, the present invention provides atorvastatin in new crystalline forms designated Forms V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, and XIX. The new crystalline forms of atorvastatin are purer, more stable, or have advantageous manufacturing properties than the amorphous product.
    • SUMMARY OF THE INVENTION
  • Accordingly, the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)a
    4.9 (broad) 9
    6.0 15
    7.0 100
    8.0 (broad) 20
    8.6 57
    9.9 22
    16.6 42
    19.0 27
    21.1 35
    aRelative intensity of 4.9 (broad) 2θ is 9.
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form V atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
    5.0
    6.1
    7.5
    8.4 (broad)
    8.7 (broad)
    9.9
    16.7
    19.0
    21.2
  • Further, the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following solid-state 13C nuclear magnetic resonance (ssNMR) spectrum wherein chemical shift is expressed in parts per million:
  • Assignment Chemical Shift
    C12 or C25 185.7
    C12 or C25 176.8
    C16 166.9
    Aromatic Carbons 138.7
    C2-C5, C13-C18, 136.3
    C19-C24, C27-C32
    133.0
    128.4
    122.0
    117.0
    116.3
    C8, C10 68.0
    Methylene Carbons 43.1
    C6, C7, C9, C11
    C33 25.6
    C34 19.9
  • Additionally, the present invention is directed to crystalline Form V atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm−1:
  •
    3062
    1652
    1604
    1528
    1478
    1440
    1413
    1397
    1368
    1158
    1034
    1001
    825
    245
    224
    130
  • In a preferred embodiment of the first aspect of the invention, crystalline Form V atorvastatin is a trihydrate.
  • In a second aspect, the present invention is directed to crystalline Form VI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)a
    7.2 11
    8.3 77
    11.0 20
    12.4 11
    13.8 9
    16.8 14
    18.5 100
    19.7 (broad) 22
    20.9 14
    25.0 (broad) 15
    aRelative intensity of 13.8 (broad) 2θ is 9.
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form VI atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     7.3
     8.5
    11.2
    12.7
    14.0
    17.1 (broad)
    18.7
    19.9
    21.1 (broad)
    25.2 (broad)
  • Further, the present invention is directed to crystalline Form VI atorvastatin and hydrates thereof characterized by the following solid-state 13C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • Assignment Chemical Shift
    C12 or C25 176.5
    C16 or C12 or C25 168.2
    C16 or C12 or C25 163.1
    C16 or C12 or C25 159.8
    Aromatic Carbons 136.8
    C2-C5, C13-C18, 127.8
    C19-C24, C27-C32
    122.3
    118.8
    113.7
    C8, C10 88.2
    C8, C10 79.3
    70.5
    Methylene Carbons 43.3
    C6, C7, C9, C11 36.9
    31.9
    C33, C34 25.9
    C33, C34 22.5
  • In a third aspect, the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    8.6 76
    10.2 70
    12.4 (broad) 12
    12.8 (broad) 15
    17.6 20
    18.3 (broad) 43
    19.3 100
    22.2 (broad) 14
    23.4 (broad) 23
    23.8 (broad) 26
    25.5 (broad) 16
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form VII atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
    8.7
    10.2
    12.4
    12.9
    17.6
    18.4
    19.4
    22.2
    23.5
    23.9
    25.6
  • Further, the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following solid-state 13C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • Assignment Chemical Shift
    C12 or C25 186.5
    C12 or C25 183.3
    C12 or C25 176.8
    C16 166.5
    159.2
    Aromatic Carbons 137.6
    C2-C5, C13-C18, 128.3
    C19-C24, C27-C32
    122.3
    119.2
    C8, C10 74.5
    C8, C10 70.3
    C8, C10 68.3
    C8, C10 66.2
    Methylene Carbons 43.5
    C6, C7, C9, C11 40.3
    C33, C34 26.3
    C33, C34 24.9
    C33, C34 20.2
  • Additionally, the present invention is directed to crystalline Form VII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm−1:
  • Raman Spectrum
    3060
    2927
    1649
    1603
    1524
    1476
    1412
    1397
    1368
    1159
    1034
    998
    824
    114
  • In a preferred embodiment of the third aspect of the invention, crystalline Form VII atorvastatin is a sesquihydrate.
  • In a fourth aspect, the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)a
     7.5 61
     9.2 29
    10.0 16
    12.1 10
    12.8 6
    13.8 4
    15.1 13
    16.7 (broad) 64
    18.6 (broad) 100
    20.3 (broad) 79
    21.2 24
    21.9 30
    22.4 19
    25.8 33
    26.5 20
    27.4 (broad) 38
    30.5 20
    aRelative intensity of 12.8 2θ is 6 and 13.8 2θ is 4.
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form VIII atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     7.5
     9.3
    10.1
    12.2
    12.8
    13.8
    15.1
    16.6-16.9
    18.5-18.9
    20.2-20.6
    21.3
    22.0
    22.5
    25.9
    26.5
    27.4 (broad)
    30.6
  • Further, the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following solid-state 13C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • Assignment Chemical Shift
    C12 or C25 186.1
    C12 or C25 179.5
    C16 167.9
    C16 161.0
    Aromatic Carbons 139.4
    C2-C5, C13-C18, 132.9
    C19-C24, C27-C32
    128.7
    124.7
    121.8
    116.6
    C8, C10 67.0
    Methylene Carbons 43.3
    C6, C7, C9, C11
    C33, C34 26.7
    C33, C34 24.7
    C33, C34 20.9
    C33, C34 20.1
  • Additionally, the present invention is directed to crystalline Form VIII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm−1:
  • Raman Spectrum
    3065
    2923
    1658
    1603
    1531
    1510
    1481
    1413
    997
    121
  • In a preferred embodiment of the fourth aspect of the invention, crystalline Form VIII atorvastatin is a dihydrate.
  • In a fifth aspect, the present invention is directed to crystalline Form IX atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
     8.8 50
     9.4 (broad) 32
    11.2-11.7 (broad) 26
    16.7 59
    17.5 (broad) 33
    19.3 (broad) 55
    21.4 (broad) 100
    22.4 (broad) 33
    23.2 (broad) 63
    29.0 (broad) 15
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form IX atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     9.0
     9.4
    10.0-10.5 (broad)  
    11.8-12.0 (broad)  
    16.9
    17.5 (broad)
    19.4 (broad)
    21.6 (broad)
    22.6 (broad)
    23.2 (broad)
    29.4 (broad)
  • In a sixth aspect, the present invention is directed to crystalline Form X atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
     4.7 35
     5.2 24
     5.8 11
     6.9 13
     7.9 53
     9.2 56
     9.5 50
    10.3 (broad) 13
    11.8 20
    16.1 13
    16.9 39
    19.1 100
    19.8 71
    21.4 49
    22.3 (broad) 36
    23.7 (broad) 37
    24.4 15
    28.7 31
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form X atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     4.7
     5.2
     5.8
     6.9
     7.9
     9.2
     9.6
    10.2-10.4
    11.9
    16.2
    16.9
    19.1
    19.9
    21.5
    22.3-22.6
    23.7-24.0 (broad)
    24.5
    28.8
  • Further, the present invention is directed to crystalline Form X atorvastatin and hydrates thereof characterized by the following solid-state 13C nuclear magnetic resonance spectrum wherein chemical shift is expressed in parts per million:
  • Assignment Chemical Shift
    C12 or C25 187.0
    C12 or C25 179.5
    C16 165.5
    C16 159.4
    Aromatic Carbons 137.9
    C2-C5, C13-C18, 134.8
    C19-C24, C27-C32 129.4
    127.9
    123.2
    119.9
    C8, C10 71.1
    Methylene Carbons 43.7
    C6, C7, C9, C11 40.9
    C33 26.4
    25.3
    C34 20.3
    18.3
  • Additionally, the present invention is directed crystalline Form X atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm−1:
  • Raman Spectrum
    3062
    2911
    1650
    1603
    1525
    1478
    1411
    1369
    1240
    1158
    1034
    999
    824
    116
  • In a preferred embodiment of the sixth aspect of the invention, crystalline Form X atorvastatin is a trihydrate.
  • In a seventh aspect, the present invention is directed to crystalline Form XI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    10.8 (broad) 58
    12.0 12
    13.5 11
    16.5 52
    17.6-18.0 (broad) 35
    19.7 82
    22.3 100
    23.2 26
    24.4 28
    25.8 17
    26.5 30
    27.3 31
    28.7 19
    29.5 12
    30.9 (broad) 17
    32.8 (broad) 11
    33.6 (broad) 15
    36.0 (broad) 15
    38.5 (broad) 14
  • In an eighth aspect, the present invention is directed to crystalline Form XII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)a
     5.4 11
     7.7 24
     8.0 25
     8.6 42
     8.9 25
     9.9 36
    10.4 (broad) 24
    12.5 18
    13.9 (broad) 9
    16.2 10
    17.8 70
    19.4 100
    20.8 51
    21.7 13
    22.4-22.6 (broad) 18
    24.3 19
    25.5 24
    26.2 11
    27.1 8
    aRelative intensity of 13.9 (broad) 2θ is 9 and 27.1 2θ is 8.
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form XII atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     5.4
     7.7
     8.1
     8.6
     8.9
    10.0
    10.5
    12.6
      14.0 (broad)
    16.2
    17.9
    19.4
    20.9
    21.8
    22.5-22.8 (broad)
    24.4
    25.6
    26.4
    27.2
  • Additionally, the present invention is directed crystalline Form XII atorvastatin and hydrates thereof characterized by the following Raman spectrum having peaks expressed in cm−1:
  • Raman Spectrum
    3064
    2973
    2926
    1652
    1603
    1527
    1470
    1410
    1367
    1240
    1159
    1034
    1002
    823
  • In a ninth aspect, the present invention is directed to crystalline Form XIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Shimadzu diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    8.4 100
    8.9 82
    15.7 (broad) 45
    16.4 (broad) 46
    17.6 (broad) 57
    18.1 (broad) 62
    19.7 (broad) 58
    20.8 (broad) 91
    23.8 (broad 57
  • In a tenth aspect, the present invention is directed to crystalline Form XIV atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    5.4 41
    6.7 31
    7.7 100
    8.1 35
    9.0 65
    16.5 (broad) 15
    17.6 (broad) 17
    18.0-18.7 (broad) 21
    19.5 (broad) 18
  • In an eleventh aspect, the present invention is directed to crystalline Form XV atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    5.7 26
    6.1 21
    6.8 18
    7.5 39
    8.1 39
    8.5 42
    9.5 33
    10.5 (broad) 18
    19.1-19.6 (broad) 32
  • In a twelfth aspect, the present invention is directed to crystalline Form XVI atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
    5.2 37
    6.4 34
    7.5 100
    8.7 79
    10.5 (broad) 19
    12.0 (broad) 10
    12.7 (broad) 17
    16.7  26
    18.3 (broad) 27
    19.5  23
    20.1-20.4 (broad) 37
    21.2-21.9 (broad) 32
    22.9-23.3 (broad) 38
    24.4-25.0 (broad) 35
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form XVI atorvastatin expressed in terms of the 2θ values was measured on a Shimadzu diffractometer with CuKα radiation:
  • 2θ
    7.6
    8.8
    10.2
    12.5
    16.8
    18.2
    19.3
    20.5
    23.0
    24.8
  • In addition, the following X-ray powder diffraction pattern of crystalline Form XVI atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
    5.1
    6.2
    7.3
    8.7
    10.2 (broad)
    12.0 (broad)
    12.7 (broad)
    16.7 
    18.0 (broad)
    19.5 (broad)
    20.0-20.5 (broad)  
    21.5-21.6 (broad)  
    22.9-23.3 (broad)  
    24.0-25.0 (broad)  
  • In a thirteenth aspect, the present invention is directed to crystalline 5 Form XVII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
     5.0 27
     6.1 33
     7.3 100
     7.9 30
     8.5 29
     9.1 22
    10.0 45
    12.1 (broad) 24
    14.8 17
    16.0-16.5 (broad) 20
    17.5 (broad) 28
    19.0 (broad) 46
    19.5 65
    20.2 (broad) 47
    21.3 64
    21.6 55
    22.0 45
  • In a fourteenth aspect, the present invention is directed to crystalline Form XVIII atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
     8.0 100
    9.2 (broad) 52
    9.7 (broad) 40
    12.1 24
    16.6 (broad)  48
    18.5 67
  • Additionally, the following X-ray powder diffraction pattern of crystalline Form XVIII atorvastatin expressed in terms of the 2θ values was measured on a Shimadzu diffractometer with CuKα radiation:
  • 2θ
    7.7
    9.3
    9.9
    12.2
    16.8
    18.5
  • In addition, the following X-ray powder diffraction pattern of crystalline Form XVIII atorvastatin expressed in terms of the 2θ values was measured on an Inel (capillary) diffractometer:
  • 2θ
     7.9
     9.2 (broad)
     9.8 (broad)
    12.2 (broad)
    16.7 (broad)
    18.5
  • In a fifteenth aspect, the present invention is directed to crystalline Form XIX atorvastatin and hydrates thereof characterized by the following X-ray powder diffraction pattern expressed in terms of the 2θ and relative intensities with a relative intensity of >10% measured on a Bruker D5000 diffractometer with CuKα radiation:
  • Relative Intensity
    2θ (>10%)
     5.2 32
     6.3 28
     7.0 100
     8.6 74
    10.5 34
    11.6 (broad) 26
    12.7 (broad) 35
    14.0 15
    16.7 (broad) 30
    18.9 86
    20.8 94
    23.6 (broad) 38
    25.5 (broad) 32
  • As inhibitors of HMG-CoA reductase, the novel crystalline forms of atorvastatin are useful hypolipidemic and hypocholesterolemic agents as well as agents in the treatment of osteoporosis and Alzheimer's disease.
  • A still further embodiment of the present invention is a pharmaceutical composition for administering an effective amount of crystalline Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, or Form XIX atorvastatin in unit dosage form in the treatment methods mentioned above. Finally, the present invention is directed to methods for production of Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, or Form XIX atorvastatin.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is further described by the following nonlimiting examples which refer to the accompanying FIGS. 1 to 35, short particulars of which are given below.
  • FIG. 1
  • Diffractogram of Form V atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 2
  • Diffractogram of Form VI atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 3
  • Diffractogram of Form VII atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 4
  • Diffractogram of Form VIII atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 5
  • Diffractogram of Form IX atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 6
  • Diffractogram of Form X atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 7
  • Diffractogram of Form XI atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 8
  • Diffractogram of Form XII atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 9
  • Diffractogram of Form XIII atorvastatin carried out on Shimadzu XRD-6000 diffractometer.
  • FIG. 10
  • Diffractogram of Form XIV atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 11
  • Diffractogram of Form XV atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 12
  • Diffractogram of Form XVI atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 13
  • Diffractogram of Form XVII atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 14
  • Diffractogram of Form XVIII atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 15
  • Diffractogram of Form XIX atorvastatin carried out on Bruker D 5000 diffractometer.
  • FIG. 16
  • Diffractogram of Form V atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 17
  • Diffractogram of Form VI atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 18
  • Diffractogram of Form VII atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 19
  • Diffractogram of Form VIII atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 20
  • Diffractogram of Form IX atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 21
  • Diffractogram of Form X atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 22
  • Diffractogram of Form XII atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 23
  • Diffractogram of Form XVI atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 24
  • Diffractogram of Form XVIII atorvastatin carried out on Inel XRG-3000 diffractometer.
  • FIG. 25
  • Solid-state 13C nuclear magnetic resonance spectrum with spinning side bands identified by an asterisk of Form V atorvastatin.
  • FIG. 26
  • Solid-state 13C nuclear magnetic resonance spectrum with spinning side bands identified by an asterisk of Form VI atorvastatin.
  • FIG. 27
  • Solid-state 13C nuclear magnetic resonance spectrum with spinning side bands identified by an asterisk of Form VII atorvastatin.
  • FIG. 28
  • Solid-state 13C nuclear magnetic resonance spectrum with spinning side bands identified by an asterisk of Form VIII atorvastatin.
  • FIG. 29
  • Solid-state 13C nuclear magnetic resonance spectrum of Form X atorvastatin.
  • FIG. 30
  • Raman spectrum of Form V.
  • FIG. 31
  • Raman spectrum of Form VI.
  • FIG. 32
  • Raman spectrum of Form VII.
  • FIG. 33
  • Raman spectrum of Form VIII.
  • FIG. 34
  • Raman spectrum of Form X.
  • FIG. 35
  • Raman spectrum of Form XII.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Crystalline Form V, Form VI, Form VII, Form VIII, Form IX, Form X, Form XI, Form XII, Form XIII, Form XIV, Form XV, Form XVI, Form XVII, Form XVIII, and Form XIX atorvastatin may be characterized by their X-ray powder diffraction patterns, by their solid state nuclear magnetic resonance spectra (NMR), and/or their Raman spectra.
    • X-Ray Powder Diffraction Forms V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV. XV, XVI, XVII. XVIII, and XIX
  • Forms V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, or XIX atorvastatin were characterized by their X-ray powder diffraction pattern. Thus, the X-ray diffraction patterns of Forms V, VI, VII, VIII, IX, X, XI, XII, or Form XIII atorvastatin were carried out on a Shimadzu XRD-6000 X-ray powder diffractometer using CuKα radiation. The instrument is equipped with a fine-focus X-ray tube. The tube voltage and amperage were set at 40 kV and 40 mA, respectively. The divergence and scattering slits were set at 10, and the receiving slit was set at 0.15 mm. Diffracted radiation was detected by a NaI scintillation detector. A theta-two theta continuous scan at 3°/min (0.4 sec/0.02° step) from 2.5 to 40° 2θ was used. A silicon standard was analyzed each day to check the instrument alignment. The X-ray diffraction patterns of Forms XIV, XV, XVI, XVII, XVIII, and XIX were carried out on a Bruker D5000 diffractometer using copper radiation, fixed slits (1.0, 1.0, 0.6 mm), and a Kevex solid state detector. Data was collected from 3.0 to 40.0 degrees in 2θ using a step size of 0.04 degrees and a step time of 1.0 seconds. It should be noted that Bruker Instruments purchased Siemans; thus, a Bruker D 5000 instrument is essentially the same as a Siemans D 5000.
  • The X-ray diffraction patterns of Forms V, VI, VII, VIII, IX, X, XII, XVI, and XVIII were also carried out on an Inel diffractometer. X-ray diffraction analyses were carried out on an Inel XRG-3000 diffractometer, equipped with a Curved Position Sensitive (CPS) detector with a 2θ range of 120 degrees. Real time data were collected using CuKα radiation starting at approximately 4° 2θ at a resolution of 0.03° 2θ. The tube voltage and amperage were set to 40 kV and 30 mA, respectively. Samples were prepared for analysis by packing them into thin-walled glass capillaries. Each capillary was mounted onto a goniometer head that is motorized to permit spinning of the capillary during data acquisition. Instrument calibration was performed daily using a silicon reference standard. The Inel diffractograms for the available forms are shown in the figures without baseline subtraction. Calculating the intensities from these diffractograms is within the skill of the art and involves using baseline subtraction to account for background scattering (e.g., scattering from the capillary).
  • To perform an X-ray powder diffraction measurement on a Shimadzu or Bruker instrument like the ones used for measurements reported herein, the sample is typically placed into a holder which has a cavity. The sample powder is pressed by a glass slide or equivalent to ensure a random surface and proper sample height. The sample holder is then placed into the instrument (Shimadzu or Bruker). The source of the X-ray beam is positioned over the sample, initially at a small angle relative to the plane of the holder, and moved through an arc that continuously increases the angle between the incident beam and the plane of the holder. Measurement differences associated with such X-ray powder analyses result from a variety of factors including: (a) errors in sample preparation (e.g., sample height), (b) instrument errors (e.g., flat sample errors), (c) calibration errors, (d) operator errors (including those errors present when determining the peak locations), and (e) preferred orientation. Calibration errors and sample height errors often result in a shift of all the peaks in the same direction and by the same amount. Small differences in sample height on a flat holder lead to large displacements in XRPD peak positions. A systematic study showed that, using a Shimadzu XRD-6000 in the typical Bragg-Brentano configuration, sample height differences of 1 mm led to peak shifts as high as 1° 2θ (Chen, et al., J. Pharmaceutical and Biomedical Analysis, 2001; 26:63). These shifts can be identified from the X-ray diffractogram and can be eliminated by compensating for the shift (applying a systematic correction factor to all peak position values) or recalibrating the instrument. In contrast, the Inel instrument used herein places the sample in a capillary which is positioned at the center of the instrument. This minimizes sample height errors (a) and preferred orientation (e). Since, when using capillaries, the sample height is not established manually, the peak locations from the Inel measurements are typically more accurate than those from the Shimadzu or the Bruker instrument. As mentioned above, it is possible to rectify measurements from the various machines by applying a systematic correction factor to bring the peak positions into agreement. In general, this correction factor will bring the peak positions from the Shimadzu and Bruker into agreement with the Inel and will be in the range of 0 to 0.2° 2θ.
  • Table 1 lists the 2θ and relative intensities of all lines in the sample with a relative intensity of >10% for crystalline Forms V-XIX atorvastatin. The numbers listed in this table are rounded numbers.
  • TABLE 1
    Intensities and Peak Locations of All Diffraction Lines With Relative Intensity Greater Than 10%a for Forms V to XIX
    (Measured on Shimadzu Diffractometer)
    Form V Form VI Form VII Form VIII Form IX Form X Form XI Form XII
    Rela- Rela- Rela- Rela- Rela- Rela- Rela- Rela-
    tive tive tive tive tive tive tive tive
    Inten- Inten- Inten- Inten- Inten- Inten- Inten- Inten-
    sity sity sity sity sity sity sity sity
    2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%)
    4.9* 9 7.2 11 8.6 76 7.5 61 8.8 50 4.7 35 10.8* 58 5.4 11
    6.0 15 8.3 77 10.2 70 9.2 29 9.4* 32 5.2 24 12.0 12 7.7 24
    7.0 100 11.0 20 12.4* 12 10.0 16 11.2-11.7* 26 5.8 11 13.5 11 8.0 25
    8.0* 20 12.4 11 12.8* 15 12.1 10 16.7 59 6.9 13 16.5 52 8.6 42
    8.6 57 13.8 9 17.6 20 12.8 6 17.5* 33 7.9 53 17.6-18.0* 35 8.9 25
    9.9 22 16.8 14 18.3* 43 13.8 4 19.3* 55 9.2 56 19.7 82 9.9 36
    16.6 42 18.5 100 19.3 100 15.1 13 21.4* 100 9.5 50 22.3 100 10.4* 24
    19.0 27 19.7* 22 22.2* 14 16.7* 64 22.4* 33 10.3* 13 23.2 26 12.5 18
    21.1 35 20.9 14 23.4* 23 18.6* 100 23.2* 63 11.8 20 24.4 28 13.9* 9
    25.0* 15 23.8* 26 20.3* 79 29.0* 15 16.1 13 25.8 17 16.2 10
    25.5* 16 21.2 24 16.9 39 26.5 30 17.8 70
    21.9 30
    22.4 19 19.1 100 27.3 31
    25.8 33 19.8 71 28.7 19 19.4 100
    26.5 20 21.4 49 29.5 12 20.8 51
    27.4* 38 22.3* 36 30.9* 17 21.7 13
    30.5 20 23.7* 37 32.8* 11 22.4-22.6* 18
    24.4 15 33.6* 15 24.3 19
    28.7 31 36.0* 15 25.5 24
    38.5* 14 26.2 11
    27.1 8
    Form XIII Form XIV Form XV Form XVI Form XVII Form XVIII Form XIX
    Rela- Rela- Rela- Rela- Rela- Rela- Rela-
    tive tive tive tive tive tive tive
    Inten- Inten- Inten- Inten- Inten- Inten- Inten-
    sity sity sity sity sity sity sity
    2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%) 2θ (>10%)
    8.4 100 5.4 41 5.7 26 5.2 37 5.0 27 8.0 100 5.2 32
    8.9 82 6.7 31 6.1 21 6.4 34 6.1 33 9.2* 52 6.3 28
    15.7* 45 7.7 100 6.8 18 7.5 100 7.3 100 9.7* 40 7.0 100
    16.4* 46 8.1 35 7.5 39 8.7 79 7.9 30 12.1 24 8.6 74
    17.6* 57 9.0 65 8.1 39 10.5* 19 8.5 29 16.6* 48 10.5 34
    18.1* 62 16.5* 15 8.5 42 12.0* 10 9.1 22 18.5 67 11.6* 26
    19.7* 58 17.6* 17 9.5 33 12.7* 17 10.0 45 12.7* 35
    20.8* 91 18.0-18.7* 21 10.5* 18 16.7 26 12.1* 24 14.0 15
    23.8* 57 19.5* 18 19.1-19.6* 32 18.3* 27 14.8 17 16.7* 30
    19.5 23 16.0-16.5* 20 18.9 86
    20.1-20.4* 37 17.5* 28 20.8 94
    21.2-21.9* 32 19.0* 46 23.6* 38
    22.9-23.3* 38 19.5 65 25.5* 32
    24.4-25.0* 35 20.2* 47
    21.3 64
    21.6 55
    22.0 45
    *Broad
    Forms XIV, XV, XVI, XVII, XVIII, and XIX were measured on Brucker D-5000 Diffractometer.
    aRelative intensity for Form V 4.9 (broad) 2θ is 9; Form VI 13.8 2θ is 9; Form VIII 12.8 2θ is 6 and 13.8 2θ is 4; and Form XII 13.9 (broad) 2θ is 9 and 27.1 2θ is 8.
  • Because only 19 crystalline forms of atorvastatin are known, each form can be identified and distinguished from the other crystalline forms by either a combination of lines or a pattern that is different from the X-ray powder diffraction of the other forms.
  • For example, Table 2 lists combination of 2θ peaks for Forms V to XIX atorvastatin, i.e., a set of X-ray diffraction lines that are unique to each form. Forms I to IV atorvastatin disclosed in U.S. Pat. Nos. 5,969,156 and 6,121,461 are included for comparison.
  • TABLE 2
    Forms I to XIX Unique Combination of 2θ Peaks
    Form I Form II Form III Form IV Form V Form VI Form VII Form VIII Form IX Form X
    9.0 8.5 8.3 4.7 6.0 7.2 8.6 7.5 8.8 4.7
    9.3 9.0 16.4 5.2 7.0 8.3 10.2 9.2 9.4* 6.9
    10.1 17.1-17.4 19.9 7.7 8.0* 11.0 12.8* 10.0 16.7 7.9
    10.4 20.5 24.2 9.4 9.9 18.5 17.6 16.7* 17.5* 9.2
    11.7 10.1 16.6 18.3* 18.6* 19.3* 9.5
    12.0 19.3 20.3* 21.4* 19.1
    16.8 29.0* 19.8
    30.0
    Form XI Form XII Form XIII Form XIV Form XV Form XVI Form XVII Form XVIII Form XIX
    10.8* 7.7 8.4 5.4 5.7 5.2 6.1 8.0 5.5
    16.5 8.0 8.9 6.7 6.1 6.4 7.3 9.2* 7.0
    19.7 8.6 20.8* 7.7 7.5 7.5 7.9 16.6* 8.6
    22.3 8.9 23.8* 8.1 8.1 8.7 10.0 18.5 10.5
    9.9 9.0 8.5 16.7 19.0* 12.7*
    17.8 9.5 20.1-20.4* 19.5 18.9
    19.4 19.1-19.6* 22.9-23.3* 21.3 20.8
    21.6
    *Broad
    Forms I to XIII were measured on Shimadzu XRD-6000 diffractometer. Forms XIV to XIX were measured on Bruker D 50001 diffractometer. Form II 2θ peaks from U.S. Pat. No. 5,969,156.
    • Solid State Nuclear Magnetic Resonance (NMR) Methodology
  • Solid-state 13C NMR spectra were obtained at 270 or 360 MHz Tecmag instruments. High-power proton decoupling and cross-polarization with magic-angle spinning at approximately 4.7 and 4.2 kHz or 4.6 and 4.0 kHz were used for 68 MHz (13C frequency) data acquisition, 4.9 and 4.4 kHz were used for 91 MHz (13C frequency) data acquisition. The magic angle was adjusted using the Br signal of KBr by detecting the side bands. A sample was packed into a 7 mm Doty rotor and used for each experiment. The chemical shifts were referenced externally to adamantine except for Form X where the chemical shifts are arbitrary.
  • Table 3 shows the solid-state NMR spectrum for crystalline Forms V, VI, VII, VIII, and X atorvastatin.
  • TABLE 3
    Figure US20080214651A1-20080904-C00002
    Chemical Shifts for Forms V, VI, VII, VIII, and X Atorvastatin
    Chemical Shift
    V VI VII VIII X
    185.7 186.5 186.1 187.0
    183.3 179.5
    176.8 176.5 176.8 179.5
    166.9 168.2 166.5 167.9 165.5
    163.1 161.0
    159.8 159.2 159.4
    138.7 136.8 137.6 139.4 137.9
    136.3 132.9 134.8
    133.0
    129.4
    128.4 127.8 128.3 128.7 127.9
    124.7 123.2
    122.0 122.3 122.3
    121.8
    118.8 119.2 119.9
    117.0
    116.3 116.6
    113.7
    88.2 74.5
    79.3
    70.5 70.3 71.1
    68.0 68.3 67.0
    66.2
    43.1 43.3 43.5 43.3 43.7
    40.3
    36.9 40.9
    31.9
    25.6 25.9 26.3 26.7 26.4
    24.9 24.7 25.3
    22.5 20.2 20.9 20.3
    19.9 20.1
    18.3
    Forms V, VI, VII, VIII, and X: Relative peak intensity over 20 are shown here (4.5, 4.6, 4.7, or 4.9 kHz CPMAS). Spectra were obtained using two different magic-angle spinning rates to determine spinning sidebands.
    Form X: Relative peak intensity over 20 are shown here (5.0 kHz CPMAS).
  • Table 4 shows unique solid-state NMR peaks for Forms V, VI, VII, VIII and X atorvastatin, ie, peaks within ±1.0 ppm. Forms I to IV atorvastatin are included for comparison.
  • TABLE 4
    Forms I to VIII and X Unique Solid-State NMR Peaks
    Form I Form II Form III Form IV Form V Form VI Form VII Form VIII Form X
    182.8 181.0 161.0 181.4 176.8 163.1 183.3 132.9 18.3
    131.1 163.0 140.1 63.5 36.9 176.8
    73.1 161.0 131.8 17.9 31.9 74.5
    64.9 140.5 69.8
    35.4
    • Raman Spectroscopy Methodology
  • The Raman spectrum was obtained on a Raman accessory interfaced to a Nicolet Magna 860 Fourier transform infrared spectrometer. The accessory utilizes an excitation wavelength of 1064 nm and approximately 0.45 W of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser power. The spectrum represents 64 or 128 co-added scans acquired at 4 cm−1 resolution. The sample was prepared for analysis by placing a portion into a 5-mm diameter glass tube and positioning this tube in the spectrometer. The spectrometer was calibrated (wavelength) with sulfur and cyclohexane at the time of use.
  • Table 5 shows the Raman spectra for Forms V, VI, VII, VIII, X, and XII atorvastatin.
  • TABLE 5
    Raman Peak Listing for Forms V, VI,
    VII, VIII, X and XII Atorvastatin
    Form V Form VI Form VII Form VIII Form X Form XII
    3062 3058 3060 3065 3062 3064
    2973
    2935 2927 2923 2911 2926
    1652 1651 1649 1658 1650 1652
    1604 1603 1603 1603 1603 1603
    1528 1556 1524 1531 1525 1527
    1525 1510
    1481
    1478 1478 1476 1478 1470
    1440
    1413 1412 1412 1413 1411 1410
    1397 1397
    1368 1368 1369 1367
    1240 1240
    1158 1157 1159 1158 1159
    1034 1034 1034 1034
    1001 997 998 997 999 1002
    825 824 824 823
    245
    224
    130
    114 121 116
    Relative peak intensity over 20 are shown.
  • Table 6 lists unique Raman peaks for Forms V, VI, VII, VIII, X, and XII atorvastatin, ie, only one other form has a peak with ±4 cm−1. In the case of Forms VI and X, it is a unique combination of peaks. Forms I to IV atorvastatin are included for comparison.
  • TABLE 6
    Forms I to VIII, X and XII Unique Raman Peaks
    Form I Form II Form III Form IV Form V Form VI* Form VII Form VIII Form X* Form XII
    3080 1663 2938 423 1440 3058 1397 1510 3062 2973
    1512 359 1660 215 1397 2935 1481 2911
    1439 1510 132 130 1556 1413 1525
    142 1481 1525 121 1240
    1427
    1182
    859
    *Unique combination of Raman peaks
  • Crystalline Forms V to XIX atorvastatin of the present invention may exist in anhydrous forms as well as hydrated and solvated forms. In general, the hydrated forms are equivalent to unhydrated forms and are intended to be encompassed within the scope of the present invention. Crystalline Form XIV contains about 6 mol of water. Preferably, Form XIV contains 6 mol of water. Crystalline Forms V, X, and XV atorvastatin contain about 3 mol of water. Preferably, Forms V, X, and XV atorvastatin contain 3 mol of water.
  • Crystalline Form VII contains about 1.5 mol of water. Preferably, Form VII atorvastatin contains 1.5 mol of water. Crystalline Form VIII contains about 2 mol of water. Preferably, Form VIII atorvastatin contains 2 mol of water.
  • Crystalline Forms XVI-XIX may exist as a solvate.
  • Crystalline forms of atorvastatin of the present invention, regardless of the extent of hydration and/or salvation having equivalent x-ray powder diffractograms, ssNMR, or Raman spectra are within the scope of the present invention.
  • Crystalline forms, in general, can have advantageous properties. A polymorph, solvate, or hydrate is defined by its crystal structure and properties. The crystal structure can be obtained from X-ray data or approximated from other data. The properties are determined by testing. The chemical formula and chemical structure does not describe or suggest the crystal structure of any particular polymorphic or crystalline hydrate form. One cannot ascertain any particular crystalline form from the chemical formula, nor does the chemical formula tell one how to identify any particular crystalline solid form or describe its properties. Whereas a chemical compound can exist in three states-solid, solution, and gas-crystalline solid forms exist only in the solid state. Once a chemical compound is dissolved or melted, the crystalline solid form is destroyed and no longer exists (Wells J. I., Aulton M. E. Pharmaceutics. The ‘Science of Dosage Form Design. Reformulation, Aulton M. E. ed., Churchill Livingstone, 1988; 13:237).
  • The new crystalline forms of atorvastatin described herein have advantageous properties. Form VII has good chemical stability, which is comparable to Form I (disclosed in U.S. Pat. No. 5,969,156). Since noncrystalline forms of atorvastatin are not chemically stable, this is a significant advantage, which would translate into enhanced shelf life and longer expiration dating. Form VII can be prepared from acetone/water, whereas Form I is prepared from the more toxic methanol/water system. Form VII is the sesquihydrate and contains less water, meaning that a unit weight of Form VII contains more atorvastatin molecules, meaning it is of higher potency.
  • The ability of a material to form good tablets at commercial scale depends upon a variety of drug physical properties, such as the Tableting Indices described in Hiestand H. and Smith D., Indices of Tableting Performance, Powder Technology, 1984; 38:145-159. These indices may be used to identify forms of atorvastatin calcium which have superior tableting performance. One such index is the Brittle Fracture Index (BFI), which reflects brittleness, and ranges from 0 (good—low brittleness) to 1 (poor—high brittleness). For example, Form VII has a BFI value 0.09, while Form I has a BFI value 0.81. Thus, Form VII is less brittle than Form I. This lower brittleness indicates greater ease of manufacture of tablets.+
  • Form VIII also has less water than Form I (dihydrate vs trihydrate) and thus a gram of Form VIII contains more atorvastatin molecules.
  • Form X is advantageous in that it can be prepared from the less toxic isopropanol (IPA):water system, thus avoiding the more toxic methanol:water system.
  • Form XII has the highest melting point (210.6). Since high melting point correlates with stability at high temperature, this means this form is most stable at temperatures near the melting point. High melting forms can be advantageous when process methods involving high temperatures are used. Form XII is also prepared from the less toxic tetrahydrofuran (THF) water system.
  • Form XIV is prepared using the less toxic THF/water system.
  • The present invention provides a process for the preparation of crystalline Forms V to XIX atorvastatin which comprises crystallizing atorvastatin from a solution in solvents under conditions which yield crystalline Forms V to XIX atorvastatin.
  • The precise conditions under which crystalline Forms V to XIX atorvastatin are formed may be empirically determined, and it is only possible to give a number of methods which have been found to be suitable in practice.
  • The compounds of the present invention can be prepared and administered in a wide variety of oral and parenteral dosage forms. Thus, the compounds of the present invention can be administered by injection, that is, intravenously, intramuscularly, intracutaneously, subcutaneously, intraduodenally, or intraperitoneally. Also, the compounds of the present invention can be administered by inhalation, for example, intranasally. Additionally, the compounds of the present invention can be administered transdermally. It will be obvious to those skilled in the art that the following dosage forms may comprise as the active component, either compounds or a corresponding pharmaceutically acceptable salt of a compound of the present invention.
  • For preparing pharmaceutical compositions from the compounds of the present invention, pharmaceutically acceptable carriers can be either solid or liquid. Solid form preparations include powders, tablets, pills, capsules, cachets, suppositories, and dispersible granules. A solid carrier can be one or more substances which may also act as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders, preservatives, tablet disintegrating agents, or an encapsulating material.
  • In powders, the carrier is a finely divided solid which is in a mixture with the finely divided active component.
  • In tablets, the active component is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
  • The powders and tablets preferably contain from two or ten to about seventy percent of the active compound. Suitable carriers are magnesium carbonate, magnesium stearate, talc, sugar, lactose, pectin, dextrin, starch, gelatin, tragacanth, methylcellulose, sodium carboxymethylcellulose, a low melting wax, cocoa butter, and the like. The term “preparation” is intended to include the formulation of the active compound with encapsulating material as a carrier providing a capsule in which the active component, with or without other carriers, is surrounded by a carrier, which is thus in association with it. Similarly, cachets and lozenges are included. Tablets, powders, capsules, pills, cachets, and lozenges can be used as solid dosage forms suitable for oral administration.
  • For preparing suppositories, a low melting wax, such as a mixture of fatty acid glycerides or cocoa butter, is first melted and the active component is dispersed homogeneously therein, as by stirring. The molten homogenous mixture is then poured into convenient sized molds, allowed to cool, and thereby to solidify.
  • Liquid form preparations include solutions, suspensions, retention enemas, and emulsions, for example water or water propylene glycol solutions. For parenteral injection, liquid preparations can be formulated in solution in aqueous polyethylene glycol solution.
  • Aqueous solutions suitable for oral use can be prepared by dissolving the active component in water and adding suitable colorants, flavors, stabilizing, and thickening agents as desired.
  • Aqueous suspensions suitable for oral use can be made by dispersing the finely divided active component in water with viscous material, such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethylcellulose, and other well-known suspending agents.
  • Also included are solid form preparations which are intended to be converted, shortly before use, to liquid form preparations for oral administration. Such liquid forms include solutions, suspensions, and emulsions. These preparations may contain, in addition to the active component, colorants, flavors, stabilizers, buffers, artificial and natural sweeteners, dispersants, thickeners, solubilizing agents, and the like.
  • The pharmaceutical preparation is preferably in unit dosage form. In such form, the preparation is subdivided into unit doses containing appropriate quantities of the active component. The unit dosage form can be a packaged preparation, the package containing discrete quantities of preparation, such as packeted tablets, capsules, and powders in vials or ampoules. Also, the unit dosage form can be a capsule, tablet, cachet, or lozenge itself, or it can be the appropriate number of any of these in packaged form.
  • The quantity of active component in a unit dose preparation may be varied or adjusted from 0.5 mg to 100 mg, preferably 2.5 mg to 80 mg according to the particular application and the potency of the active component. The composition can, if desired, also contain other compatible therapeutic agents.
  • In therapeutic use as hypolipidemic and/or hypocholesterolemic agents and agents to treat osteoporosis and Alzheimer's disease, the crystalline Forms V to XIX atorvastatin utilized in the pharmaceutical method of this invention are administered at the initial dosage of about 2.5 mg to about 80 mg daily. A daily dose range of about 2.5 mg to about 2θ mg is preferred. The dosages, however, may be varied depending upon the requirements of the patient, the severity of the condition being treated, and the compound being employed. Determination of the proper dosage for a particular situation is within the skill of the art. Generally, treatment is initiated with smaller dosages which are less than the optimum dose of the compound. Thereafter, the dosage is increased by small increments until the optimum effect under the circumstance is reached. For convenience, the total daily dosage may be divided and administered in portions during the day if desired.
  • The following nonlimiting examples illustrate the inventors' preferred methods for preparing the compounds of the invention.
    • EXAMPLE 1 [R—(R*,R*)]-2-(4-Fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid hemi calcium salt (Forms V-XIX Atorvastatin) Form V Atorvastatin Method A
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was slurried in a mixture of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
    • Method B
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was slurried in a mixture of acetonitrile/water (9:1) at 60° C. overnight, filtered, and air dried to afford crystalline Form V atorvastatin.
    • Method C
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was stressed under vapors of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
    • Method D
  • Acetonitrile was added to a solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in tetrahydrofuran/water (9:1) and cooled to afford crystalline Form V atorvastatin.
    • Method E
  • Acetonitrile was added to a solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in dimethylformamide/water and fast evaporation affords crystalline Form V atorvastatin.
    • Method F
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) diffused in a vapor of acetonitrile/water (9:1) to afford crystalline Form V atorvastatin.
  • Crystalline Form V atorvastatin, mp 171.40° C., trihydrate Karl Fischer 4.88% (3 mol of water).
    • Form VI Atorvastatin Method A
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) was placed into a vapor jar containing dimethylformamide/water (9:1) for 20 days to afford crystalline Form VI atorvastatin.
    • Method B
  • Fast evaporation of a dimethylformamide/water solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) afforded crystalline Form VI atorvastatin.
    • Method C
  • Fast evaporation of a dimethylformamide/water (saturated) solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) seeded with crystalline Form VI afforded crystalline Form VI atorvastatin. Crystalline Form VI atorvastatin, mp 145.9° C.
    • Form VII Atorvastatin Method A
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (1:1) (5.8 mg/mL) was stirred overnight. A solid formed which was filtered to afford crystalline Form VII atorvastatin.
    • Method B
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (1:1) was evaporated at 50° C. to afford crystalline Form VII atorvastatin.
    • Method C
  • A saturated solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (1:1) was seeded with crystalline Form VII atorvastatin to afford crystalline Form VII atorvastatin.
    • Method D
  • Fast evaporation of a saturated solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (1:1) was seeded with crystalline Form VII to afford crystalline Form VII atorvastatin. Crystalline Form VII atorvastatin, mp 195.9° C., 1.5 hydrate Karl Fischer 2.34% (1.5 mol of water).
    • Form VIII Atorvastatin Method A
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in dimethylformamide/water (saturated) (9:1), was seeded with crystalline Form VII and evaporated to afford crystalline Form VIII atorvastatin.
    • Method B
  • Fast evaporation of a solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in dimethylformamide/water (9:1) affords crystalline Form VIII atorvastatin.
  • Crystalline Form VIII atorvastatin, mp 151° C., dihydrate Karl Fischer 2.98% (2 mol of water).
    • Form IX Atorvastatin Method A
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (6:4) (3.4 mg/mL) was evaporated on a rotary evaporator to afford crystalline Form IX atorvastatin.
    • Method B
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (6:4) was filtered, seeded with crystalline Form IX evaporated on a rotary evaporator to afford crystalline Form IX atorvastatin.
    • Method C
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetone/water (6:4) was stirred for 0.5 hours, filtered, evaporated on rotary evaporator to concentrate the solution, and dried in a vacuum oven to afford crystalline Form IX atorvastatin.
    • Form X Atorvastatin Method A
  • A slurry of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in isopropanol/water (9:1) was stirred for a few days, filtered, and air dried to afford crystalline Form X atorvastatin.
    • Method B
  • A slurry of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in isopropanol/water (9:1) was stirred for 5 days, filtered, and air dried to afford crystalline Form X atorvastatin.
    • Method C
  • A saturated solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in isopropanol/water (9:1) was stirred for 2 days, filtered, and air dried to afford crystalline Form X atorvastatin. Crystalline Form X atorvastatin, mp 180.1° C., trihydrate Karl Fischer 5.5% (3.5 mol of water).
    • Form XI Atorvastatin
  • A solution of amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995) in acetonitrile/water (9:1) was filtered and allowed to evaporate slowly to afford crystalline Form XI atorvastatin.
    • Form XII Atorvastatin
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was slurried in tetrahydrofuran/water (2:8) at 90° C. for 5 days, filtered, and air dried to afford crystalline Form XII atorvastatin.
  • Crystalline Form XII atorvastatin, mp 210.6° C.
    • Form XIII Atorvastatin
  • Crystalline Form I atorvastatin calcium (U.S. Pat. No. 5,969,156) was added to 10 mL 2:8 water:methanol to leave a layer of solid on the bottom of a vial. The slurry was heated to about 70° C. for 5 days. The supernatant was removed, and the solid air dried to afford crystalline Form XIII atorvastatin.
    • Form XIV Atorvastatin
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for 3 weeks in 45 mL of isopropyl alcohol/5 mL of water (9:1) at ambient temperature. The mixture was filtered to afford crystalline Form XIV atorvastatin after drying at ambient temperature.
  • Differential scanning calorimetry (DSC) indicates a low desolvation event at about 60° C. (peak) followed by a melt at about 150° C. Combustion analysis indicates that the compound is a hexahydrate. Thermographic infrared spectroscopy (TG-1R) shows the compound contains water. Karl Fischer shows the compound contains 5.8% water.
    • Form XV Atorvastatin
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for 3 weeks in 45 mL acetonitrile/5 mL of water (9:1) at ambient temperature. The mixture was filtered to afford crystalline Form XV atorvastatin after drying at ambient temperature. DSC indicates a low desolvation event at about 78° C. (peak) followed by a melt at about 165° C. Combustion analysis indicates that the compound is a trihydrate. TG-1R shows the compound contains water.
    • Form XVI Atorvastatin
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 1 g, was slurried for about 1 day in 9:1 acetonitrile/water at room temperature. The mixture was filtered to afford crystalline Form XVI atorvastatin after drying at ambient temperature. DSC indicates a broad endotherm at peak temperature of 72° C. and an endotherm with onset temperature of 164° C. The weight loss profile by thermographic analysis (TGA) indicates a total weight loss of about 7% at 30° C. to 160° C. Combustion analysis indicates that TGA and Karl Fischer analysis (shows 7.1% water) indicates the compound is a tetrahydrate/acetonitrile solvate.
    • Form XVII Atorvastatin
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 0.5 g, was slurried for about 2 days in 5 mL of 9:1 dimethylformamide (DMF)/water containing 25 mL of acetonitrile at room temperature. The mixture was filtered to afford crystalline Form XVII atorvastatin after drying at ambient temperature. DSC showed multiple broad endotherms indicating the compound was a solvate.
    • Form XVIII Atorvastatin
  • Crystalline Form XVI atorvastatin, 0.5 g, was dried for about 1 day at room temperature to afford crystalline Form XVIII atorvastatin. DSC showed a broad endotherm at low temperature indicating the compound was a solvate. Karl Fischer analysis showed the compound contained 4.4% water.
    • Form XIX Atorvastatin
  • Amorphous atorvastatin calcium (U.S. Pat. No. 5,273,995), 0.4 g, was slurried for about 7 days in 4 mL methyl ethyl ketone at room temperature. The mixture was filtered to afford crystalline Form XIX atorvastatin after drying at ambient temperature. DSC indicated a low desolvation event at about 50° C. (peak) followed by a melt at about 125° C. TGA analysis indicates that the compound is a solvate that desolvates at low temperature.

Claims (5)

1-15. (canceled)
16-18. (canceled)
19. A method of treating hyperlipidemia, hypercholesterolemia, osteoporosis or Alzheimer's Disease comprising administering to a host suffering therefrom a therapeutically effective amount of crystalline Form X or a hydrate thereof having an X-ray powder diffraction containing the following 2θ values measured using CuKα radiation: 4.7, 5.2, 5.8, 6.9, 7.9, 9.2, 9.5, 10.3 (broad), 11.8, 16.1, 16.9, 19.1, 19.8, 21.4, 22.3 (broad), 23.7 (broad), 24.4, and 28.7, in solid unit dosage form.
20. A method of treating hyperlipidemia, hypercholesterolemia, osteoporosis or Alzheimer's Disease comprising administering to a host suffering therefrom a therapeutically effective amount of crystalline Form X or a hydrate thereof characterized by solid state 13C nuclear magnetic resonance having the following chemical shifts expressed in parts per million: 18.3, 20.3, 25.3, 26.4, 40.9, 43.7, 71.1, 119.9, 123.2, 127.9, 129.4, 134.8, 137.9, 159.4, 165.5, 179.5, and 187.0, in solid unit dosage form.
21. A method of treating hyperlipidemia, hypercholesterolemia, osteoporosis or Alzheimer's Disease comprising administering to a host suffering therefrom a therapeutically effective amount of crystalline Form X or a hydrate thereof characterized by Raman spectroscopy having the following peaks expressed in cm−1: 116, 284, 999, 1034, 1158, 1240, 1369, 1411, 1478, 1525, 1603, 1650, 2911, and 3062, in solid unit dosage form.
US11/977,459 2001-06-29 2007-10-25 Crystalline forms of [R-(R*, R*)]-2-(4-fluorophenyl)-beta,delta-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1) Abandoned US20080214651A1 (en)

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US11/441,268 US20060241169A1 (en) 2001-06-29 2006-05-25 Crystalline forms of [R-(R*.R*)]-2-(4-fluorophenyl)-beta,delta-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic acid calcium salt (2:1)
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