JPS5770852A - Preparation of optical active alpha-cyano-3-phenyl-benzyl-2-(4-chlorophenyl) isovalerate - Google Patents
Preparation of optical active alpha-cyano-3-phenyl-benzyl-2-(4-chlorophenyl) isovalerateInfo
- Publication number
- JPS5770852A JPS5770852A JP14726580A JP14726580A JPS5770852A JP S5770852 A JPS5770852 A JP S5770852A JP 14726580 A JP14726580 A JP 14726580A JP 14726580 A JP14726580 A JP 14726580A JP S5770852 A JPS5770852 A JP S5770852A
- Authority
- JP
- Japan
- Prior art keywords
- phenvalerate
- isovalerate
- cyano
- chlorophenyl
- phenyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To obtain the titled compound having strong insecticidal activity advantageously with respect to industrial production and economical aspect, by crystallizing phenvalerate Aα from a solution of phenvalerate A in the presence of substantially pure crystal of phenvalerate Aα.
CONSTITUTION: When crystal of phenvalerate Aα[(S)-α-cyano-3-phenoxybenzyl (S)-2-(4-chlorophenyl)isovalerate]is crystallized from a solution of phenvalerate A[α-cyano-3-phenoxybenzyl(S)-2-(4-chloro-phenyl)isovalerate] in the presence or absence of a basic reagent(e.g., NH3), first the solution of phenvalerate A is heated at ≥40°C, phenvalerate Aα recrystallized from a solvent (e.g., alcohol type) is used as seed crystal, phenvalerate Aα is crystallized in the solvent (e.g., alcohol type), and the crystal together with phenvalerate A in the mother liquor is recovered, to give phenvalerate A rich in phenvalerate Aα.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14726580A JPS5770852A (en) | 1980-10-20 | 1980-10-20 | Preparation of optical active alpha-cyano-3-phenyl-benzyl-2-(4-chlorophenyl) isovalerate |
US06/313,089 US4422978A (en) | 1980-10-20 | 1981-10-20 | Method for preparing optically active carboxylic acid esters |
DE8181304922T DE3167334D1 (en) | 1980-10-20 | 1981-10-20 | Preparation of insecticidal optically active isovalerate esters |
EP81304922A EP0050521B1 (en) | 1980-10-20 | 1981-10-20 | Preparation of insecticidal optically active isovalerate esters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14726580A JPS5770852A (en) | 1980-10-20 | 1980-10-20 | Preparation of optical active alpha-cyano-3-phenyl-benzyl-2-(4-chlorophenyl) isovalerate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5770852A true JPS5770852A (en) | 1982-05-01 |
Family
ID=15426311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14726580A Pending JPS5770852A (en) | 1980-10-20 | 1980-10-20 | Preparation of optical active alpha-cyano-3-phenyl-benzyl-2-(4-chlorophenyl) isovalerate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5770852A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54103832A (en) * | 1978-12-26 | 1979-08-15 | Sumitomo Chem Co Ltd | Higher active alpha-cyano-3-penoxybenzyl 2-(4-chlorophenyl)-isovelerate and insecticide containing the same as effective component |
JPS55104250A (en) * | 1979-02-05 | 1980-08-09 | Sumitomo Chem Co Ltd | Optically active alpha-cyano-3-phenoxybenzyl 2-(4-tert- butylphenyl)isovalerate, its preparation, and insecticide and acaricide comprising it |
-
1980
- 1980-10-20 JP JP14726580A patent/JPS5770852A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54103832A (en) * | 1978-12-26 | 1979-08-15 | Sumitomo Chem Co Ltd | Higher active alpha-cyano-3-penoxybenzyl 2-(4-chlorophenyl)-isovelerate and insecticide containing the same as effective component |
JPS55104250A (en) * | 1979-02-05 | 1980-08-09 | Sumitomo Chem Co Ltd | Optically active alpha-cyano-3-phenoxybenzyl 2-(4-tert- butylphenyl)isovalerate, its preparation, and insecticide and acaricide comprising it |
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