Preparation of halomethylbenzoyl cyanides and novel halomethylbenzoyl cyanides

US5446199A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz Isak · Haßloch, DE
• Thomas Wettling · Schifferstadt, DE
• Michael Keil · Freinsheim, DE
• Bernd Wolf · Niederkirchen, DE
• Reinhard Doetzer · Weinheim, DE

Key dates

• Filing date: Mar 23, 1994
• Grant date: Aug 29, 1995
• Expiry date: Mar 23, 2014

Classification

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

Abstract

A process for preparing halomethylbenzoyl cyanides I EQU Ph-CO-CN I (Ph=phenyl radical substituted by chloromethyl or bromomethyl which, if desired, can additionally carry 1-4 further radicals) by reacting halomethylbenzoyl chlorides II EQU Ph-CO-Cl II with an alkali metal cyanide or transition metal cyanide, if appropriate in an organic diluent, and novel halomethylbenzoyl cyanides I' ##STR1## (X=halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, CF.sub.3, C.sub.1 -C.sub.5 -alkyl-(C.sub.1 -C.sub.5 -alkyl)hydroxyimino or C.sub.1 -C.sub.5 -alkyl-(C.sub.2 -C.sub.5 -alkenyl)hydroxyimino; m=0 to 4 and Y=chloromethyl or bromomethyl) are described. The halomethylbenzoyl cyanides I are important intermediates for the synthesis of plant protection agents.