Preparation of 2-aryloxy-2-haloproptonic acid compounds

US4348534A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerd Husslein · Bad Dürkheim, DE
• Gerhard Hamprecht · Weinheim, DE

Key dates

• Filing date: Jun 17, 1981
• Grant date: Sep 7, 1982
• Expiry date: Jun 17, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C69/712
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Aryloxy-2-halopropionic acid compounds are prepared by reacting 2-aryloxypropionic acid compounds with N-halocarboxylic acid imides in the presence of aliphatic halohydrocarbons as solvents, and of from 0.0001 to 0.001 mole of halogen per mole of N-halocarboxylic acid imide, from 0.005 to 0.05 per cent by weight of water, based on N-halocarboxylic acid imide, and from 0.0005 to 0.005 mole of azo-bis-isobutyronitrile and/or dibenzoyl peroxide, per mole of N-halocarboxylic acid imide. The end products obtainable by the process of the invention are valuable starting materials for the preparation of drugs, crop protection agents and dyes.