Combating arthropods with stereoisomers of 2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropane-1-carboxylic acid .alpha.- c

US4287208A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rainer Fuchs · Halver, DE
• Ingeborg Hammann · Cologne, DE
• Bernhard Homeyer · Leverkusen, DE
• Wolfgang Behrenz · Overath, DE
• Wilhelm Stendel · Wuppertal, DE

Key dates

• Filing date: Jul 3, 1980
• Grant date: Sep 1, 1981
• Expiry date: Jul 3, 2000

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N53/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An arthropodicidally active substantially pure stereoisomer of 2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropane-1-carboxylic acid .alpha.-cyano-3-phenoxy-4-fluoro-benzyl ester of the formula ##STR1## selected from the group consisting of ester in which the asymmetric C atoms , , and .alpha. have the following configuration: ______________________________________ Absolute configuration at the center Isomer 1 3 .alpha. ______________________________________ a R R R b R R S c R S R d R S S e S S S f S S R g S R S h S R R, ______________________________________ and diastereomeric mixtures of (1R)-cis- and (1R)-trans-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropane-1-carboxylic acid (R,S)-.alpha.-cyano-3-phenoxy-4-fluoro-benzyl esters of the formula ##STR2##