Process for the preparation of 1,1-disubstituted cyclopropane derivatives

US5189165A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gerhard Burdinski · Nastätten, DE
• Reinhard Kirsch · Braunschweig, DE
• Hariolf Kottmann · Hofheim, DE

Key dates

• Filing date: Dec 21, 1990
• Grant date: Feb 23, 1993
• Expiry date: Dec 21, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B45/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing a compound I ##STR1## with A=t-butyl, aryl and PA1 R=alkyl, alkenyl, alkynyl, alkenynyl, cycloalkyl(alkyl), aryl, arylalkyl, alkyl-S-(-O)-aryl by reacting a compound III ##STR2## with a compound IV ##STR3## under the conditions of a phase-transfer reaction, is described. The process gives excellent yields and is not associated with the unpleasant odor of mercaptans.