Patent · US Expired

Preparation of acyl chlorides

US5623082A · kind A · utility

2Cited by

2References

9Claims

0Family size

Assignee

BASF SE

Inventors

Martin Decker · Ludwigshafen, DE
Wolfgang Franzischka · Bischofswerda, DE
Rudolf Irnich · Worms, DE
Manfred Sauerwald · Meckenheim, DE

Key dates

Filing date	Jul 11, 1995
Grant date	Apr 22, 1997
Priority date	—
Expiry date	Jul 11, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/60
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Acyl chlorides are prepared by reacting a carboxylic acid or its anhydride with carbonyl chloride in the presence of a carboxamide of the formula I ##STR1## where R.sup.1 is a radical of the formula ##STR2## R.sup.2 and R.sup.3 are each alkyl of 1 to 9 carbon atoms, R.sup.4 and R.sup.5 are each hydrogen or alkyl of 1 to 9 carbon atoms and the two radicals R.sup.1 and R.sup.2 may furthermore be a hydrocarbon radical which completes the moiety ##STR3## to form a heterocyclic structure, and the stated alkyl and hydrocarbon radicals may furthermore contain substituents which are inert under the reaction conditions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.