Process for the preparation of carbamoyl chlorides derived from secondary amines

US4770820A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunther Semler · Kelkheim, DE
• Georg Schaeffer

Key dates

• Filing date: Apr 14, 1986
• Grant date: Sep 13, 1988
• Expiry date: Apr 14, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C271/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Carbamoyl chlorides derived from secondary aliphatic amines having alkyl groups which are branched in the 1-position are prepared by passing phosgene at an elevated temperature into the corresponding, initially taken--if appropriate dissolved in an inert solvent--secondary aliphatic amines having alkyl groups which are branched in the 1-position. The reaction products are intermediates in various specialized fields, particularly in the plant protection sector.