Optically active herbicidal ethyl-2-(4-(6-chloro-benzoxazol-2-yloxy)-phenoxy)-propionate

US5254527A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans J. Nestler · Königstein, DE
• Gerhard Horlein · Frankfurt am Main, DE
• Reinhard Handte · Gablingen, DE
• Hermann Bieringer · Eppstein, DE
• Friedhelm Schwerdtle · Eppstein, DE
• Peter Langeluddeke · Hofheim, DE
• Peter Frisch · Frankfurt am Main, DE

Key dates

• Filing date: Nov 7, 1991
• Grant date: Oct 19, 1993
• Expiry date: Nov 7, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B2200/07
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Optically active enantiomers of the formula I ##STR1## where R is a group of the formulae ##STR2## R.sub.1 and R.sub.2, among others, are halogen or CF.sub.3 and Z is a carboxyl, carboxylate, carboxylic acid ester, thioester, carbonamide, carboxylic acid anilide, carbohydrazide or thioamide group, are interesting herbicides the effect of which is considerably superior to that of the optically inactive racemates.