Preparation of carbonyl chlorides

US5245063A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Ksoll · Dossenheim, DE
• Wolfgang Reuther · Neckargemünd, DE
• Andreas Hohmann · Ludwigshafen, DE
• Peter Wittmer · Bischofswerda, DE

Key dates

• Filing date: Sep 10, 1991
• Grant date: Sep 14, 1993
• Expiry date: Sep 10, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing carbonyl chlorides of the formula I ##STR1## where R is C.sub.1 -C.sub.30 -alkyl, C.sub.2 -C.sub.30 -alkenyl or C.sub.2 -C.sub.30 -alkynyl, from essentially equimolar amounts of a carboxylic acid of the formula II ##STR2## where R has the abovementioned meanings, and phosgene COCl.sub.2 (III), in the presence of a catalytic adduct of phosgene and N,N-disubstituted formamide or the hydrochlorides thereof, of the formula IV where R.sup.1 and R.sup.2 are each, independently of one another, C.sub.1 -C.sub.3 -alkyl or together are a C.sub.4 -C.sub.5 -alkylene chain which may be interrupted by oxygen or by nitrogen which carries C.sub.1 -C.sub.3 -alkyl or CHO, and n is 0, 1 or 2, wherein the reaction is carried out with a stationary phase of the catalytic adduct, is described.