WO2001044152A1 - Process for the production of trifluoromethylacetophenones - Google Patents
Process for the production of trifluoromethylacetophenones Download PDFInfo
- Publication number
- WO2001044152A1 WO2001044152A1 PCT/EP2000/010596 EP0010596W WO0144152A1 WO 2001044152 A1 WO2001044152 A1 WO 2001044152A1 EP 0010596 W EP0010596 W EP 0010596W WO 0144152 A1 WO0144152 A1 WO 0144152A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- general formula
- group
- aromatic ring
- process according
- acidification
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/004—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reaction with organometalhalides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation 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
Definitions
- the present invention relates to a method for preparation of trifluoromethylacetophenones, specifically, 3-trifluoromethylacetophenone.
- the present invention provides a process for producing the trifluoromethylacetophenones in high yield and purity and employs readily available starting materials. Furthermore, the described process has advantages with respect to environmental protection.
- the process of the present invention comprises the two steps of (a) reacting a trifluoromethylbenzoyl halide with a cyclic secondary amine in the presence of aqueous base to form a cycloalkyl-trifluoromethylbenzamide and (b) addition of a methyl Grignard reagent to said benzamide followed by acidification with aqueous acetic acid to form the product.
- a trifluoromethylbenzoyl halide with a cyclic secondary amine in the presence of aqueous base to form a cycloalkyl-trifluoromethylbenzamide
- a methyl Grignard reagent to said benzamide followed by acidification with aqueous acetic acid to form the product.
- the present invention provides a process for the preparation of trifluoromethylacetophenones of the general formula I
- Hal is a halogen atom selected from the group consisting of fluorine, chlorine, bromine, and iodine, with a cyclic secondary amine of the general formula
- A is C 3 -C 7 -alkylene bridge which may be interrupted by a oxygen or sulfur atom in the presence of an aqueous base, used as an acid acceptor, resulting in the formation of a cycloalkyl-trifluoromethylbenzamide of the general formula IV
- the process is used to produce 3-trifluoromethylacetophenone.
- the cyclic secondary amine of formula III specifically contributes to the high yield and purity of the trifluoromethylacetophenone so produced.
- the cyclic secondary amine typically denotes pyrrolidine, piperidine either unsubstituted or substituted in 2, 3 or 4 position by lower alkyl like methyl or ethyl, or preferably is morpholine or thiomorpholine.
- the reactions of both steps (a) and (b) are typically carried out at moderate temperatures, ranging from about room temperature (+20°C to 25°C) to about +60°C.
- the trifluoromethylbenzoyl halide reactants are known. Particularly useful in the practice of the present invention is 3-trifluoromethylbenzoyl chloride.
- the bases useful as an acid acceptor are sodium hydroxide, potassium hydroxide, potassium carbonate, potassium bicarbonate, sodium carbonate, sodium bicarbonate, calcium carbonate, calcium hydroxide, zinc oxide, calcium oxide and mixtures thereof in aqueous solution at concentrations of about 5-70%.
- the cyclic amine may be any of those within the above-defined formula III and mixtures of one or more thereof, but are not limited to given examples.
- Particularly useful in the process of the present invention are piperidine and morpholine.
- the process of the invention is carried out in an inert solvent such as an ether like diethylether, ethylmethylether, tert.butyl-methylether, tetrahydrofuran, dioxane and the like.
- Grignard reagents used for the present invention are the Grignard reagents which employ methyl as the alkyl substituent. Typical are l-Mg-CH 3 , Br-Mg-CH 3 and CI-Mg-CH 3 .
- Acidification is preferably accomplished with acetic acid.
- acidification reagents such as hydrochloric acid, sulfuric acid and ammonium chloride may also be employed in the process of the present invention.
- the high purity products of the present invention facilitate the handling as intermediates for the production of the important agricultural fungicide trifloxystrobin.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL14971300A IL149713A0 (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluormethylacetophenones |
JP2001545242A JP2003517029A (en) | 1999-12-14 | 2000-10-27 | Method for producing trifluoromethylacetophenone |
AU13889/01A AU1388901A (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones |
MXPA02005873A MXPA02005873A (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones. |
BR0016320-1A BR0016320A (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones |
EP00975941A EP1240127A1 (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones |
KR1020027006569A KR20020056943A (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones |
HK03105240.4A HK1052926A1 (en) | 1999-12-14 | 2003-07-21 | Process for the production of trifluoromethylacetophenones |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9929562.8A GB9929562D0 (en) | 1999-12-14 | 1999-12-14 | Organic compounds |
GB9929562.8 | 1999-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001044152A1 true WO2001044152A1 (en) | 2001-06-21 |
Family
ID=10866309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/010596 WO2001044152A1 (en) | 1999-12-14 | 2000-10-27 | Process for the production of trifluoromethylacetophenones |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP1240127A1 (en) |
JP (1) | JP2003517029A (en) |
KR (1) | KR20020056943A (en) |
CN (1) | CN1409697A (en) |
AU (1) | AU1388901A (en) |
BR (1) | BR0016320A (en) |
GB (1) | GB9929562D0 (en) |
HK (1) | HK1052926A1 (en) |
IL (1) | IL149713A0 (en) |
MX (1) | MXPA02005873A (en) |
WO (1) | WO2001044152A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI455919B (en) * | 2008-04-09 | 2014-10-11 | Du Pont | Method for preparing 3-trifluoromethyl chalcones |
JP5211876B2 (en) * | 2008-06-11 | 2013-06-12 | セントラル硝子株式会社 | Method for producing high purity 2'-trifluoromethylpropiophenone |
CN104478792B (en) * | 2014-12-26 | 2016-10-05 | 西华大学 | A kind of compound with bacteriostatic activity and the preparation method and application of water solublity liquor thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5969188A (en) * | 1999-01-05 | 1999-10-19 | Nipa Hardwicke, Inc. | Process for producing trifluoromethylacetophenones |
WO1999054272A1 (en) * | 1998-04-18 | 1999-10-28 | Avecia Limited | Process for the preparation of 2-hydroxyalkyl halophenones |
-
1999
- 1999-12-14 GB GBGB9929562.8A patent/GB9929562D0/en not_active Ceased
-
2000
- 2000-10-27 KR KR1020027006569A patent/KR20020056943A/en not_active Application Discontinuation
- 2000-10-27 WO PCT/EP2000/010596 patent/WO2001044152A1/en not_active Application Discontinuation
- 2000-10-27 MX MXPA02005873A patent/MXPA02005873A/en unknown
- 2000-10-27 CN CN00816915A patent/CN1409697A/en active Pending
- 2000-10-27 IL IL14971300A patent/IL149713A0/en unknown
- 2000-10-27 AU AU13889/01A patent/AU1388901A/en not_active Abandoned
- 2000-10-27 EP EP00975941A patent/EP1240127A1/en not_active Withdrawn
- 2000-10-27 JP JP2001545242A patent/JP2003517029A/en active Pending
- 2000-10-27 BR BR0016320-1A patent/BR0016320A/en not_active Application Discontinuation
-
2003
- 2003-07-21 HK HK03105240.4A patent/HK1052926A1/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999054272A1 (en) * | 1998-04-18 | 1999-10-28 | Avecia Limited | Process for the preparation of 2-hydroxyalkyl halophenones |
US5969188A (en) * | 1999-01-05 | 1999-10-19 | Nipa Hardwicke, Inc. | Process for producing trifluoromethylacetophenones |
Non-Patent Citations (1)
Title |
---|
MARTIN, R. ET AL: "Simple and efficient preparation of ketones from morpholine amides", SYNLETT (1997), (12), 1414-1416, XP002165265 * |
Also Published As
Publication number | Publication date |
---|---|
GB9929562D0 (en) | 2000-02-09 |
BR0016320A (en) | 2002-08-27 |
JP2003517029A (en) | 2003-05-20 |
AU1388901A (en) | 2001-06-25 |
KR20020056943A (en) | 2002-07-10 |
HK1052926A1 (en) | 2003-10-03 |
MXPA02005873A (en) | 2003-01-28 |
IL149713A0 (en) | 2002-11-10 |
CN1409697A (en) | 2003-04-09 |
EP1240127A1 (en) | 2002-09-18 |
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