CN105593201B - 制备卤代酮的方法 - Google Patents

制备卤代酮的方法 Download PDF

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CN105593201B
CN105593201B CN201480053777.2A CN201480053777A CN105593201B CN 105593201 B CN105593201 B CN 105593201B CN 201480053777 A CN201480053777 A CN 201480053777A CN 105593201 B CN105593201 B CN 105593201B
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halogenated ketone
ketone
methyl
formula
coch
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CN105593201A (zh
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S·帕斯诺克
C·冯克
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Bayer CropScience AG
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/673Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton
    • C07C45/676Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton by elimination of carboxyl groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/78Separation; Purification; Stabilisation; Use of additives
    • C07C45/86Use of additives, e.g. for stabilisation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/16Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/16Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
    • C07C49/167Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen containing only fluorine as halogen

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract

本发明涉及制备卤代酮的新方法。

Description

制备卤代酮的方法
本发明涉及制备卤代酮的新方法。
卤代酮,例如二氟丙酮和三氟丙酮,是制备生物活性化合物的重要中间体:WO2009/000442。
二氟丙酮或三氟丙酮可由例如二氟乙酸酯或三氟乙酸和甲基溴化镁制备(Isr.Journal of Chemistry,1999,39,155)。然而,二氟丙酮的收率仅为47%,三氟丙酮的仅为56%。
二氟丙酮和三氟丙酮也可由三氟乙酰乙酸酯在20%浓度的硫酸存在下裂解而制备(Tetrahedron,1964,20,2163)。该反应的缺点在于难以找到不受腐蚀且反应能在其中进行的适宜的结构材料。这里,引起腐蚀的成分不仅有硫酸,还有释出的氟化物。这种组合使得不可能使用钢制搪瓷、不锈钢和哈氏合金(Hastelloy)罐。
EP0623575(B1)描述了将羧酸与酮酯在催化量的鎓盐存在下反应而合成酮:
CF3COOH+CF3C(O)CH(COOEt)+CH3SO3H→CF3COCH3+2CF3COOEt
该方法并不经济:其额外需要羧酸(例如CF3COOH)。另外,其形成酯,这带来纯化产物的问题。
基于上文描述的现有技术,本发明解决的问题是提供没有上述缺点并因而提供以高收率获得卤代酮的途径的方法。
上文描述的问题通过一种制备式(I)的卤代酮的新方法而解决,
R1COCH3 (I),
其中
R1为卤代烷基,
其特征在于,将式(II)的酮酯在磷酸存在下裂解,
R1COCH2COOR2 (II),
其中
R2为烷基或苄基,以及
R1如上所定义。
出人意料地,在本发明的条件下获得的式(I)的卤代酮具有高收率和高纯度,且没有强腐蚀性反应条件,因而本发明的方法克服了上述现有技术中所述制备方法的缺点。
优选本发明的一种方法,其中式(I)和(II)化合物的基团定义如下:
R1选自CF3、CF2H、CF2Cl;
R2选自甲基、乙基、正丙基、苄基。
特别优选本发明的一种方法,其中式(I)和(II)化合物的基团定义如下:
R1为CF2H;
R2选自甲基、乙基。
一般定义
卤代烷基:具有1至6个(优选1至3个)碳原子的直链或支链烷基,其中这些基团中的一些或全部氢原子可被卤素原子替代,如上所述,例如(但不限于)C1-C3-卤代烷基,如氯甲基、溴甲基、二氯甲基、三氯甲基、氟甲基、二氟甲基、三氟甲基、氯氟甲基、二氯氟甲基、氯二氟甲基、1-氯乙基、1-溴乙基、1-氟乙基、2-氟乙基、2,2-二氟乙基、2,2,2-三氟乙基、2-氯-2-氟乙基、2-氯-2-二氟乙基、2,2-二氯-2-氟乙基、2,2,2三氯乙基、五氟乙基和1,1,1-三氟丙-2-基。
为了本发明的目的,烷基是直链、支链或环状的饱和烃基。定义C1-C12-烷基涵盖本文对烷基定义的最宽的范围。具体地,该定义涵盖例如甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、正戊基、正己基、1,3-二甲基丁基、3,3-二甲基丁基、正庚基、正壬基、正癸基、正十一烷基或正十二烷基。
方法说明
方案1:
用作起始化合物的式(II)的酮酯化合物是已知的且市售可得。根据本发明,反应过程中的温度为20℃至200℃,优选70℃至130℃。
本发明的方法可任选地以连续操作的模式进行。
制备1mol式(I)化合物所用H3PO4的量为5-500g、优选20-350g。产物一经分离,H3PO4即可重复使用而无需纯化。可至少进行5次这样的循环而收率不会下降。优选使用H3PO4水溶液。H3PO4的浓度为20-85%,优选85%。优选使用含量为70-85%的工业级原料。还可使用多磷酸。该反应任选地在惰性溶剂(例如氯苯、甲苯)中进行。在该方法中未观察到玻璃和金属结构材料的腐蚀。
实施例1
二氟丙酮HCF2COCH3
首先将150ml的H3PO4(85%w/w)倒入250ml的装有蒸馏桥(distillation bridge)的多颈烧瓶中并加热至100℃至105℃。通过注射泵在3小时内加入132g 91%w/w纯度的二氟乙酰乙酸乙酯(0.720mol)。在5小时内连续地移出沸点为40-60℃的馏出物。该反应在5小时后完成。总共收集到75g澄清无色液体。
此馏分的组成为(由19F NMR测得):
70%w/w HCF2COCH3
11%w/w HCF2C(OH)2CH3水合物
14%w/w HCF2C(OEt)(OH)CH3单缩酮(monoketal)
该混合物可进一步使用而无需纯化。如果需要,可对H3PO4进行第二次蒸馏以进一步纯化。水合物和单缩酮同时裂解并转化成二氟丙酮。
使用5g H3PO4在蒸馏后能获得67g纯度为95%至96%的二氟丙酮(HCF2COCH3)。收率为94%至95%。

Claims (5)

1.制备式(I)的卤代酮的方法,
R1COCH3 (I),
其中
R1为C1-C3-卤代烷基,
其特征在于,将式(II)的酮酯在磷酸存在下以下列反应路线裂解,
其中
R2为C1-C12-烷基或苄基,以及
R1如上所定义。
2.根据权利要求1所述的方法,其特征在于,
R1选自CF3、CF2H、CF2Cl;
R2选自甲基、乙基、正丙基、苄基。
3.根据权利要求1所述的方法,其特征在于,
R1为CF2H;
R2选自甲基、乙基。
4.根据权利要求1至3任一项所述的方法,其特征在于,其在70℃至130℃的温度下进行。
5.根据权利要求1至3任一项所述的方法,其特征在于,其以连续操作的模式进行。
CN201480053777.2A 2013-10-23 2014-10-20 制备卤代酮的方法 Active CN105593201B (zh)

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Citations (3)

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DE4313794A1 (de) * 1993-04-27 1994-11-03 Solvay Fluor & Derivate Verfahren zur Herstellung von Ketonen
US5481029A (en) * 1993-04-27 1996-01-02 Solvay Fluor Und Derivate Gmbh Process for preparation of ketones
JP2001172218A (ja) * 1999-12-20 2001-06-26 Ube Ind Ltd ケトンの製法

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DE2843767A1 (de) * 1978-10-06 1980-04-17 Bayer Ag Fluorderivate des 3,3-dimethyl-butan-2-ons und verfahren zu ihrer herstellung
JPS58120781A (ja) * 1982-01-13 1983-07-18 Sakae Tajima アルミニウム及びアルミニウム合金の化学研磨法
DE4025188A1 (de) * 1990-08-09 1992-02-13 Bayer Ag Verfahren zur herstellung von halogenmethylketonen, insbesondere von 1,1,1-trifluoraceton
JP5103791B2 (ja) * 2006-05-29 2012-12-19 新日本理化株式会社 還元ラノリンの製造方法
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Publication number Priority date Publication date Assignee Title
DE4313794A1 (de) * 1993-04-27 1994-11-03 Solvay Fluor & Derivate Verfahren zur Herstellung von Ketonen
US5481029A (en) * 1993-04-27 1996-01-02 Solvay Fluor Und Derivate Gmbh Process for preparation of ketones
JP2001172218A (ja) * 1999-12-20 2001-06-26 Ube Ind Ltd ケトンの製法

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EP3060540B1 (de) 2018-06-27
WO2015059067A1 (de) 2015-04-30
KR102273140B1 (ko) 2021-07-02
CN105593201A (zh) 2016-05-18
EP3060540A1 (de) 2016-08-31
MX2016005146A (es) 2016-08-11
IL245054A0 (en) 2016-06-30
TWI648256B (zh) 2019-01-21
DK3060540T3 (en) 2018-10-15
US20160272563A1 (en) 2016-09-22
TW201522298A (zh) 2015-06-16
BR112016008697B8 (pt) 2021-12-21
BR112016008697A2 (zh) 2017-08-01
JP2016534058A (ja) 2016-11-04
JP6458022B2 (ja) 2019-01-23

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