CN110577503A - 一种卤素取代化合物及其制备方法和应用 - Google Patents
一种卤素取代化合物及其制备方法和应用 Download PDFInfo
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- CN110577503A CN110577503A CN201910709834.2A CN201910709834A CN110577503A CN 110577503 A CN110577503 A CN 110577503A CN 201910709834 A CN201910709834 A CN 201910709834A CN 110577503 A CN110577503 A CN 110577503A
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- Prior art keywords
- formula
- pyrazole
- substituted
- alkyl
- halogen substituted
- Prior art date
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- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 54
- 150000001875 compounds Chemical class 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 125000005843 halogen group Chemical group 0.000 title abstract 8
- 150000003217 pyrazoles Chemical class 0.000 claims abstract description 20
- -1 halogenated acetyl halide Chemical class 0.000 claims abstract description 17
- HDZGCSFEDULWCS-UHFFFAOYSA-N monomethylhydrazine Chemical compound CNN HDZGCSFEDULWCS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 125000003226 pyrazolyl group Chemical group 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 150000004885 piperazines Chemical class 0.000 claims abstract description 3
- 150000002367 halogens Chemical group 0.000 claims description 46
- 238000006243 chemical reaction Methods 0.000 claims description 40
- 239000011737 fluorine Substances 0.000 claims description 23
- 229910052731 fluorine Inorganic materials 0.000 claims description 23
- 125000001072 heteroaryl group Chemical group 0.000 claims description 19
- 125000006552 (C3-C8) cycloalkyl group Chemical group 0.000 claims description 17
- 125000004209 (C1-C8) alkyl group Chemical group 0.000 claims description 16
- 229910052801 chlorine Inorganic materials 0.000 claims description 16
- 239000000460 chlorine Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- 125000003118 aryl group Chemical group 0.000 claims description 10
- 125000003107 substituted aryl group Chemical group 0.000 claims description 8
- 239000000575 pesticide Substances 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- BTNQQZUCGGUBAH-UHFFFAOYSA-N CNNC1=C(C=NN)C=CC=C1 Chemical compound CNNC1=C(C=NN)C=CC=C1 BTNQQZUCGGUBAH-UHFFFAOYSA-N 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 8
- 125000001309 chloro group Chemical group Cl* 0.000 claims 4
- 150000002431 hydrogen Chemical class 0.000 claims 4
- 238000009776 industrial production Methods 0.000 abstract description 2
- HBSSKMLVDRDBJU-UHFFFAOYSA-N C(C1=CC=CC=C1)=NN.CNN Chemical compound C(C1=CC=CC=C1)=NN.CNN HBSSKMLVDRDBJU-UHFFFAOYSA-N 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical group ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 15
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical group CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 12
- CRLSHTZUJTXOEL-UHFFFAOYSA-N 2,2-difluoroacetyl fluoride Chemical compound FC(F)C(F)=O CRLSHTZUJTXOEL-UHFFFAOYSA-N 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 9
- 239000000543 intermediate Substances 0.000 description 8
- RLOHOBNEYHBZID-UHFFFAOYSA-N 3-(difluoromethyl)-1-methylpyrazole-4-carboxylic acid Chemical compound CN1C=C(C(O)=O)C(C(F)F)=N1 RLOHOBNEYHBZID-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 6
- 150000001408 amides Chemical class 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- MRQQMVMIANXDKC-UHFFFAOYSA-N ethyl 3-(difluoromethyl)-1-methylpyrazole-4-carboxylate Chemical compound CCOC(=O)C1=CN(C)N=C1C(F)F MRQQMVMIANXDKC-UHFFFAOYSA-N 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- XTDZGXBTXBEZDN-UHFFFAOYSA-N 3-(difluoromethyl)-N-(9-isopropyl-1,2,3,4-tetrahydro-1,4-methanonaphthalen-5-yl)-1-methylpyrazole-4-carboxamide Chemical compound CC(C)C1C2CCC1C1=C2C=CC=C1NC(=O)C1=CN(C)N=C1C(F)F XTDZGXBTXBEZDN-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000005799 Isopyrazam Substances 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 239000003899 bactericide agent Substances 0.000 description 4
- 230000000855 fungicidal effect Effects 0.000 description 4
- 239000000417 fungicide Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- MPBKAOHKPAKJDA-VCHYOVAHSA-N 2-(3-aminopropyl)-1-[(e)-(2,2-difluoro-1-phenylethylidene)amino]guanidine Chemical compound NCCCN=C(N)N\N=C(\C(F)F)C1=CC=CC=C1 MPBKAOHKPAKJDA-VCHYOVAHSA-N 0.000 description 3
- 239000005738 Bixafen Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000003512 Claisen condensation reaction Methods 0.000 description 3
- 239000005788 Fluxapyroxad Substances 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- LDLMOOXUCMHBMZ-UHFFFAOYSA-N bixafen Chemical compound FC(F)C1=NN(C)C=C1C(=O)NC1=CC=C(F)C=C1C1=CC=C(Cl)C(Cl)=C1 LDLMOOXUCMHBMZ-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- SXSGXWCSHSVPGB-UHFFFAOYSA-N fluxapyroxad Chemical compound FC(F)C1=NN(C)C=C1C(=O)NC1=CC=CC=C1C1=CC(F)=C(F)C(F)=C1 SXSGXWCSHSVPGB-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004128 high performance liquid chromatography Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- ZMYFCFLJBGAQRS-IRXDYDNUSA-N (2R,3S)-epoxiconazole Chemical compound C1=CC(F)=CC=C1[C@@]1(CN2N=CN=C2)[C@H](C=2C(=CC=CC=2)Cl)O1 ZMYFCFLJBGAQRS-IRXDYDNUSA-N 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- BXPYXUULYZZKNA-UHFFFAOYSA-N 1-[1-methyl-3-(trifluoromethyl)pyrazol-4-yl]ethanone Chemical class CC(=O)C1=CN(C)N=C1C(F)(F)F BXPYXUULYZZKNA-UHFFFAOYSA-N 0.000 description 2
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- 239000005767 Epoxiconazole Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XQJQCBDIXRIYRP-UHFFFAOYSA-N N-{2-[1,1'-bi(cyclopropyl)-2-yl]phenyl}-3-(difluoromethyl)-1-methyl-1pyrazole-4-carboxamide Chemical compound FC(F)C1=NN(C)C=C1C(=O)NC1=CC=CC=C1C1C(C2CC2)C1 XQJQCBDIXRIYRP-UHFFFAOYSA-N 0.000 description 2
- 239000005834 Sedaxane Substances 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 2
- 150000001263 acyl chlorides Chemical class 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 125000004386 diacrylate group Chemical group 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- FBCCMZVIWNDFMO-UHFFFAOYSA-N dichloroacetyl chloride Chemical compound ClC(Cl)C(Cl)=O FBCCMZVIWNDFMO-UHFFFAOYSA-N 0.000 description 2
- GZKHDVAKKLTJPO-UHFFFAOYSA-N ethyl 2,2-difluoroacetate Chemical compound CCOC(=O)C(F)F GZKHDVAKKLTJPO-UHFFFAOYSA-N 0.000 description 2
- CBDPWKVOPADMJC-UHFFFAOYSA-N ethyl 4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)CC(=O)C(F)F CBDPWKVOPADMJC-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical compound [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- AZPWOLJQERBBBM-UHFFFAOYSA-N 2-chloro-2,2-difluoroacetyl chloride Chemical compound FC(F)(Cl)C(Cl)=O AZPWOLJQERBBBM-UHFFFAOYSA-N 0.000 description 1
- XWAUUOIYUMIQCO-UHFFFAOYSA-N 4-chloro-4,4-difluoro-3-oxobutanoyl chloride Chemical compound FC(F)(Cl)C(=O)CC(Cl)=O XWAUUOIYUMIQCO-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- MFQGJLDXOONIQW-UHFFFAOYSA-N C=CCN1CCN(CC=C)C(=O)C1 Chemical compound C=CCN1CCN(CC=C)C(=O)C1 MFQGJLDXOONIQW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000000640 cyclooctyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- CCGKOQOJPYTBIH-UHFFFAOYSA-N ethenone Chemical compound C=C=O CCGKOQOJPYTBIH-UHFFFAOYSA-N 0.000 description 1
- KDVPGBVZKTVEIS-UHFFFAOYSA-N ethyl 2-(ethoxymethylidene)-4,4-difluoro-3-oxobutanoate Chemical compound CCOC=C(C(=O)C(F)F)C(=O)OCC KDVPGBVZKTVEIS-UHFFFAOYSA-N 0.000 description 1
- FIOCAFXJNSJHHM-UHFFFAOYSA-N ethyl 3-[chloro(difluoro)methyl]-1-methylpyrazole-4-carboxylate Chemical compound CCOC(=O)C1=CN(C)N=C1C(F)(F)Cl FIOCAFXJNSJHHM-UHFFFAOYSA-N 0.000 description 1
- ILOXLVPMINVBMG-UHFFFAOYSA-N ethyl 4-chloro-4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)CC(=O)C(F)(F)Cl ILOXLVPMINVBMG-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- FMVJYQGSRWVMQV-UHFFFAOYSA-N ethyl propiolate Chemical compound CCOC(=O)C#C FMVJYQGSRWVMQV-UHFFFAOYSA-N 0.000 description 1
- 125000002541 furyl group Chemical group 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Substances NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 description 1
- 230000011987 methylation Effects 0.000 description 1
- 238000007069 methylation reaction Methods 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000003386 piperidinyl group Chemical group 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006798 ring closing metathesis reaction Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- GKASDNZWUGIAMG-UHFFFAOYSA-N triethyl orthoformate Chemical compound CCOC(OCC)OCC GKASDNZWUGIAMG-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/10—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by doubly bound oxygen or sulphur atoms
- C07D295/104—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by doubly bound oxygen or sulphur atoms with the ring nitrogen atoms and the doubly bound oxygen or sulfur atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
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Abstract
本发明涉及一种卤素取代化合物的制备方法,如式Ⅰ所示的哌嗪衍生物与如式Ⅵ所示的卤代乙酰卤衍生物反应生成如式Ⅱ所示的卤素取代化合物。本发明还涉及一种卤素取代化合物制备吡唑衍生物的制备方法,如式Ⅱ所示的卤素取代化合物与甲基肼反应,关吡唑环生成如式Ⅳ所示的卤素取代烷基‑1‑甲基吡唑衍生物;或与甲基肼苯甲醛腙反应,生成如式Ⅲ所示的腙化合物,在酸的作用下,关吡唑环生成如式Ⅳ所示的卤素取代烷基‑1‑甲基吡唑衍生物。本发明还涉及中间体化合物的结构。本发明的卤素取代化合物和吡唑衍生物的制备方法适于产业化生产。
Description
技术领域
本发明涉及一种卤素取代化合物的产业化合成方法,属于化学合成技术领域。
背景技术
卤素取代的吡唑衍生物,尤其是含氟吡唑衍生物是很多医药或者农药的中间体。在这些含氟吡唑衍生物中,3-二氟甲基-1-甲基吡唑-4-羧酸是一个重要的农药中间体,在很多农药新品种中扮演了非常重要的中间体角色,比如拜耳作物科学公司推出的谷类杀菌剂联苯吡菌胺(Bixafen),巴斯夫推出的新品杀菌剂氟唑菌酰胺(Fluxapyroxad),先正达推出的吡唑萘菌胺(Isopyrazam),氟唑环菌胺(Sedaxane)等。
。
国际专利WO1992/12970公开了3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸及其作为杀真菌剂的用途。该方法将3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸转化成对应的酰氯,然后使用合适的胺转化成对应的酰胺,从而制成酰胺类杀菌剂。
由于3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸是合成上述酰胺类新型杀菌剂的关键中间体,其合成工艺的研究激起了化学家们的广泛研究,现有的制备方法可以归结为以下几类:
一,克莱森缩合的方法,主要是BASF和Syngenta专利报道的。从二氟乙酸乙酯出发经克莱森缩合反应得到二氟乙酰乙酸乙酯,再与原甲酸三乙酯缩合得到4,4-二氟-2-(乙氧亚甲基)-3-氧代丁酸乙酯,跟甲基肼关环后生成3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸乙酯(DFMMP),经氢氧化钠水解,盐酸酸化后得到3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸(DFPA)。此路线由于成本较高,除了已经在生产的产品线以外,新的合成方法研究一般不再采用此法。
二,二甲氨基丙烯酸乙酯法,Bayer专利WO2009043444,类似地,WO2009133178BASF公司将二甲氨基用哌啶基替代。该类方法将二氟乙酰氟气体通入到二甲氨基丙烯酸乙酯中,得到的中间体直接跟甲基肼关环生成3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸乙酯(DFMMP),经氢氧化钠水解,盐酸酸化后得到3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸(DFPA)。其中二氟乙酰氟气体通过四氟乙醚的高温裂解得到。该路线设计巧妙,具有步骤短,收率高的特点,是目前成本较低的方法。缺点在于对设备的要求较高,同时,反应会产生大量挥发性的二甲胺,影响环境,也没有解决甲基肼关环合成吡唑环的选择性问题。
三,二氟氯乙酰氯法,Solvay的专利WO2012025469。该路线由Solvay开发,利用二氟氯乙酰氯(CDFAC)为起始原料,与乙烯酮反应后用乙醇淬灭得到二氟氯乙酰乙酸乙酯,跟克莱森缩合类似的方法得到3-(二氟氯甲基)-1-甲基-1H-吡唑-4-羧酸乙酯,锌粉还原或者钯碳氢化得到3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸乙酯(DFMMP),经氢氧化钠水解,盐酸酸化后得到3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸(DFPA)。该路线的缺点在于路线较长,原材料的来源问题,以及最后脱氯的问题,不但增加了成本,也增加了三废。
四,其他合成方法。1)EP 2008996报道了以二氯乙酰氯、乙烯基醚类化合物、甲基肼等原料5 步反应合成3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸。虽然在成本的控制上有一定优势,但反应条件比较苛刻,其中二氯乙酰氯和乙烯基醚类化合物需要在-40~-20℃的条件下反应;催化加压上羧基的反应中,反应温度150℃,过程中要不断改变釜内压强,操作不便,且异构体不易分离;2)WO2009000442报道了以二氟乙酸乙酯为原料,跟水合肼反应生成酰肼,甲基化后再跟丙炔酸乙酯关环得到3-(二氟甲基)-1-甲基-1H-吡唑-4-羧酸乙酯(DFMMP),该方法收率不高,且丙炔酸乙酯价格较贵,不适合工业化生产。
发明内容
本发明要解决的技术问题是,提供一种适于产业化生产吡唑衍生物的卤素取代化合物,以及该卤素取代化合物的制备方法,以及该卤素取代化合物作为中间体制备吡唑衍生物的制备方法和用途。
本发明为解决上述技术问题提出的一种技术方案是:一种卤素取代化合物的制备方法,如式Ⅰ所示的哌嗪衍生物与如式Ⅵ所示的卤代乙酰卤衍生物反应生成如式Ⅱ所示的卤素取代化合物,反应溶剂优选为氯仿,催化剂优选为三乙胺,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1、X2和X3各自独立为氯或氟,
优选X1、X2和X3为氟,R4为氢,R1为OC2H5或CH3。
本发明为解决上述技术问题提出的一种技术方案是:一种卤素取代化合物,具有如式Ⅱ所示的结构,
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟,
优选X1、X2为氟,R4为氢,R1为OC2H5或CH3。
本发明为解决上述技术问题提出的一种技术方案是:一种卤素取代化合物制备吡唑衍生物的制备方法,如式Ⅱ所示的卤素取代化合物与甲基肼反应,关吡唑环生成如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟,
优选X1、X2为氟,R4为氢,R1为OC2H5或CH3;
当R1为ORA时,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物与碱性溶液进行水解反应,碱性溶液优选为氢氧化钠溶液,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,当R1为RA时,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物与氧化剂进行氧化反应,氧化剂优选为次氯酸钠溶液、次溴酸钠溶液或氧气,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
本发明为解决上述技术问题提出的一种技术方案是:一种卤素取代化合物制备吡唑衍生物的制备方法,如式Ⅱ所示的卤素取代化合物与甲基肼苯甲醛腙反应,生成如式Ⅲ所示的腙化合物,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟,
优选X1、X2为氟,R4为氢,R1为OC2H5或CH3;
所述如式Ⅲ所示的腙化合物在酸的作用下,酸优选为硫酸,关吡唑环生成如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物,反应式如下:
,
当R1为ORA时,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物与碱性溶液进行水解反应,碱性溶液优选为氢氧化钠溶液,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,当R1为RA时,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物与氧化剂进行氧化反应,氧化剂优选为次氯酸钠溶液、次溴酸钠溶液或氧气,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
本发明为解决上述技术问题提出的一种技术方案是:一种制备农药的方法,上述制备卤素取代化合物或吡唑衍生物的方法。所述农药是酰胺类杀菌剂,优选为联苯吡菌胺、氟唑菌酰胺、吡唑萘菌胺或氟唑环菌胺。制备农药的方法是将卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,优选用羧酸卤化物转化为活化的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,再将所述活化的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸与胺,优选是苯胺,反应以获得酰胺类杀菌剂。具体制备方法参考国际专利WO1992/12970。
本发明为解决上述技术问题提出的一种技术方案是:上述制备方法制得的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸作为制备农药的中间体的应用。所述农药是酰胺类杀菌剂,优选为联苯吡菌胺、氟唑菌酰胺、吡唑萘菌胺或氟唑环菌胺。
本发明具有积极的效果:
(1)本发明对卤素取代化合物的结构进行了优化,卤素取代化合物的两个N构成哌嗪,使得卤素取代化合物获得了中心对称的结构,采用该结构的卤素取代化合物合成吡唑衍生物时,反应副产物少。本发明的反应的路线较短,反应条件普通,只需用到40%的烷基肼类化合物水溶液,各步反应收率高,中间体易纯化,产品质量高。与3-哌啶环丙烯酸酯结构相比,此对称二胺的结构,原子经济性更高,同时对称二胺的沸点较高,更易回收利用。
(2)本发明制备卤素取代化合物采用与原料化合物和卤代乙酰卤衍生物易于制备,可直接外购,原料成本低。
(3)本发明制备吡唑衍生物时,可以先用卤素取代化合物与甲基肼苯甲醛腙反应,再在酸的作用下关吡唑环,优点在于甲基肼苯甲醛腙的形成腙保护基,在一个反应容器中即可反应,进一步地保障了得到无异构体的关环产物。
具体实施方式
下面通过实施例对本发明进行具体的描述,有必要在此指出的是以下实施例只用于对本发明进行进一步说明,不能理解为对本发明保护范围的限制,该领域的技术人员可以根据上述本发明内容对本发明作出一些非本质的改进和调整。
除非另行定义,文中所使用的所有专业与科学用语与本领域熟练人员所熟悉的意义相同。例如:C1~C8的烷基是指碳链长度为1~8的烷基,如:甲基、乙基、丙基、异丙基、丁基、异丁基、仲丁基、叔丁基、戊基、己基、庚基、辛基等。C3~C8的环烷基是指碳链长度为3~8的环烷基,如:环丙基、环丁基、环戊基、环己基、环辛基等。具有取代基的C3~C8的环烷基,如:2-甲基环丙基、1-甲基环戊基、4-甲基环己基等。芳基是指碳链长度为6~18的芳香族烃的一价基团,如:苯基、萘基、蒽基等。具有取代基的芳基,如:3-甲基苯基(间甲苯基)、2 ,4-二叔丁基苯基、4-氯苯基等。杂芳基,如:呋喃基、吡咯基、吲哚基、咔唑基、咪唑基等。具有取代基的杂芳基是指杂芳基的氢原子的1个以上被取代基取代而成的基团。
本发明的实施例以式Ⅵ所示的卤代乙酰卤衍生物为二氟乙酰氟为例,
,
如式Ⅵ所示的卤代乙酰卤衍生物,当X1、X2和X3为氟,R4为氢时,即为二氟乙酰氟。
二氟乙酰氟气体可由四氟乙醚高温裂解而成,裂解反应温度为200℃~400℃,催化剂是三氧化铝。
实施例1
本实施例的吡唑衍生物的制备方法,包括以下步骤:
在反应瓶中加入28.2g(0.1mol)的N,N’-双丙烯酸乙酯哌嗪(如式Ⅰ所示,其中R1为OC2H5),200g的氯仿,22.2g(0.22mol)的三乙胺,控温10℃~30℃内,通入21.5g(0.22mol)的二氟乙酰氟(DFAF),通气完毕后,继续保温反应5小时,减压浓缩溶剂,残留物,加入100g的水,搅拌30分钟,过滤,干燥得到相应的卤素取代化合物(如式Ⅱ所示)42.9g,收率98%。
将39g(0.0889mol)的卤素取代化合物产品悬浮于200g的氯仿中,搅拌冷却至-25℃,慢慢滴入20.5g(0.178mol)的浓度为40%的甲基肼(MMH)滴加完毕后,继续保温反应30分钟,升温至室温,分去水层,有机层,浓缩至干,残留物加入石油醚重结晶,得到3-氟代烷基-1-甲基吡唑-4-羧酸乙酯(EDFMPA)(如式Ⅳ所示)30.8g,收率85%。
将30.8g(0.151mol)的3-氟代烷基-1-甲基吡唑-4-羧酸乙酯(EDFMPA)投入反应瓶内,加入100g水,6.7g氢氧化钠,70℃搅拌反应2小时,反应完毕后,滴加盐酸中和至pH值为2,冷却至10℃,过滤,少量冷水洗涤,干燥得到3-氟代烷基-1-甲基-1H-吡唑-4-羧酸(DFMPA)(如式Ⅴ所示)25.2g,收率95%,高效液相色谱法检测纯度为99%。
实施例2
本实施例的吡唑衍生物的制备方法,包括以下步骤:
在反应瓶中加入28.2g(0.1mol)的N,N’-双丙烯酸乙酯哌嗪(如式Ⅰ所示,其中R1为OC2H5),200g的氯仿,22.2g(0.22 mol)的三乙胺,控温10℃~30℃内,通入21.5g(0.22mol)的二氟乙酰氟(DFAF),通气完毕后,继续保温反应5小时,反应完毕后,滴加26.8g(0.2mol)的甲基肼苯甲醛腙(BzH)升温至50℃,保温反应3小时,减压蒸去溶剂,残留物,再加入200g的氯仿和5g的硫酸,室温反应8小时,加入50g的水,分取有机层,升温至60℃,滴加浓度为10%的氢氧化钠溶液90g。滴完后继续反应3小时,反应毕,分取水层,滴加盐酸中和至pH值为2,冷却至10℃,过滤,水洗,干燥,得到3-氟代烷基-1-甲基-1H-吡唑-4-羧酸(DFMPA)(如式Ⅴ所示)26g,总收率73.8%,高效液相色谱法检测纯度为99%。
实施例3
本实施例的吡唑衍生物的制备方法,包括以下步骤:
在反应瓶中,加入22.2g(0.1mol)的N,N’-双乙烯基甲基酮哌嗪(如式Ⅰ所示,其中R1为CH3)、200g的氯仿、22.2g(0.22mol)的三乙胺,控温10℃~30℃内,通入21.5g(0.22mol)的二氟乙酰氟(DFAF),通气完毕后,继续保温反应5小时,滴加26.8g(0.2mol)的甲基肼苯甲醛腙(BzH)升温至50℃,保温反应3小时,减压蒸去溶剂,残留物,再加入200g的氯仿和5g的硫酸,室温反应8小时,加入50g的水,分取有机层,有机层浓缩至干,加入石油醚重结晶,过滤、干燥,得到3-三氟甲基-1-甲基-4-乙酰基吡唑衍生物(如式Ⅳ所示)27.2g,收率78%。
在反应瓶中加入25g(0.14mol)的3-三氟甲基-1-甲基-4-乙酰基吡唑衍生物、80g的醋酸、1g的硝酸锰和1g的硝酸铁,升温至80℃,通入氧气反应20小时,减压蒸去醋酸,残留物加入80g的水,搅拌升温至80℃,冷却至10℃,过滤,干燥,得到3-氟代烷基-1-甲基-1H-吡唑-4-羧酸(DFMPA)(如式Ⅴ所示)24g,收率95%,高效液相色谱法检测纯度为99%。
显然,上述实施例仅仅是为清楚地说明本发明所作的举例,而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而这些属于本发明的精神所引伸出的显而易见的变化或变动仍处于本发明的保护范围之中。
Claims (10)
1.一种卤素取代化合物,其特征在于:具有如式Ⅱ所示的结构,
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟。
2.一种如权利要求1所述的卤素取代化合物的制备方法,其特征在于:
如式Ⅰ所示的哌嗪衍生物与如式Ⅵ所示的卤代乙酰卤衍生物反应生成如式Ⅱ所示的卤素取代化合物,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1、X2和X3各自独立为氯或氟。
3.一种采用如权利要求1所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:
如式Ⅱ所示的卤素取代化合物与甲基肼反应,关吡唑环生成如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟。
4.根据权利要求3所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:其中R1为ORA,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物进行水解反应,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
5.根据权利要求3所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:其中R1为RA,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物进行氧化反应,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
6.一种采用如权利要求1所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:
如式Ⅱ所示的卤素取代化合物与甲基肼苯甲醛腙反应,生成如式Ⅲ所示的腙化合物,反应式如下:
,
其中,
R1为ORA或RA,其中,RA为C1~C8的烷基、C3~C8的环烷基、具有取代基的C3~8的环烷基、芳基、具有取代基的芳基、杂芳基或具有取代基的杂芳基,
R4为氢、氯、氟或C1~C8的烷基,
X1和X2各自独立为氯或氟;
所述如式Ⅲ所示的腙化合物在酸的作用下,关吡唑环生成如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物,反应式如下:
。
7.根据权利要求6所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:其中R1为ORA,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物进行水解反应,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
8.根据权利要求6所述的卤素取代化合物制备吡唑衍生物的制备方法,其特征在于:其中R1为RA,所述如式Ⅳ所示的卤素取代烷基-1-甲基吡唑衍生物进行氧化反应,生成如式Ⅴ所示的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸,反应式如下:
。
9.一种制备农药的方法,其特征在于:包括权利要求2、3、6中任一项所述的制备方法。
10.一种如权利要求3和6中任一项所述的制备方法制得的卤素取代烷基-1-甲基-1H-吡唑-4-羧酸作为制备农药的中间体的应用。
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