Preparation of halomethylbenzoyl cyanides

US5780665A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz Isak · Haßloch, DE
• Michael Keil · Freinsheim, DE
• Bernd Wolf · Niederkirchen, DE
• Horst Wingert · Mannheim, DE
• Thomas Wettling · Schifferstadt, DE

Key dates

• Filing date: May 6, 1997
• Grant date: Jul 14, 1998
• Expiry date: May 6, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C253/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Halomethylbenzoyl cyanides I EQU PH--CO--CN (I) where Ph is phenyl which is substituted by chloromethyl or bromomethyl and may cary 1-4 other rradicals, are prepared from halomethylbenzoyl chlorides II EQU PH--CO--Cl (II), by reacting II with a cyanide-donating compound in the presence of a Lewis acid, if required in an inert organic solvent or diluent, and then isolating the product. The halomethylbenzoyl cyanides I are important intermediates for synthesizing crop protection agents.