Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1991007379) PREPARATION OF MIXTURES OF CYPERMETHRIN OR CYFLUTHRIN ISOMERS ENRICHED IN MORE ACTIVE SPECIES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007379 International Application No.: PCT/US1990/005578
Publication Date: 30.05.1991 International Filing Date: 01.10.1990
Chapter 2 Demand Filed: 14.05.1991
IPC:
C07C 255/39 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
255
Carboxylic acid nitriles
01
having cyano groups bound to acyclic carbon atoms
32
having cyano groups bound to acyclic carbon atoms of a carbon skeleton containing at least one six-membered aromatic ring
38
the carbon skeleton being further substituted by esterified hydroxy groups
39
with hydroxy groups esterified by derivatives of 2,2-dimethylcyclopropane carboxylic acids, e.g. chrysanthemumic acids
Applicants:
FMC CORPORATION [US/US]; 1735 Market Street Philadelphia, PA 19103, US
Inventors:
GLENN, Michael, Stephen; US
Agent:
FELLOWS, Charles, C. ; FMC Corporation 1735 Market Street Philadelphia, PA 19103, US
Priority Data:
438,65717.11.1989US
Title (EN) PREPARATION OF MIXTURES OF CYPERMETHRIN OR CYFLUTHRIN ISOMERS ENRICHED IN MORE ACTIVE SPECIES
(FR) PREPARATION DE MELANGES D'ISOMERES DE CYPERMETHRINE OU DE CYFLUTHRINE ENRICHIS DANS DES ESPECES PLUS ACTIVES
Abstract:
(EN) This application discloses a process for the preparation of an ($i(R,S))-(cyano)(3-phenoxyphenyl)methyl or (R,S,)-(cyano)(4-fluoro-3-phenoxyphenyl)methyl $i(cis)/$i(trans)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate enriched in the more insecticidal c2 and t2 isomers by the addition of (R,S)-$g(a)-hydroxy-3-phenoxyphenylacetonitrile or (R,S,)-$g(a)-hydroxy-4-fluoro-3-phenoxyphenylacetonitrile to the $i(cis)/$i(trans) acid chloride in refluxing heptanes in an inert atmosphere. The reaction mixture is then washed with aqueous base and the ester recovered.
(FR) Cette invention concerne un procédé pour préparer un ($i(R,S))-(cyano)(3-phénoxyphényle)méthyle ou un (R,S,)-(cyano)(4-fluoro-3-phénoxyphényle)méthyle $i(cis)/$i(trans)-3-(2,2-dichloroethylène)-2,2-diméthylcyclo-propanecarboxylate enrichi dans les isomères c2 et t2 à plus forte activité insecticide par l'ajout de (R,S)-$g(a)-hydroxy-3-phénoxyphénylacetonitrile ou de (R,S,)-$g(a)-hydroxy-4-fluoro-3-phénoxyphenylacétonitrile ou $i(cis)/$i(trans) chlorure d'acide dans des heptanes dans une atmosphère inerte. Le mélange de réaction est ensuite lavé avec une base aqueuse et on récupère l'ester.
Designated States: BR, CA, HU, JP, KR, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
ZA1990/08570EP0500572JP6062536CA2068532KR1019920703518