The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 1997
Filed:
Jul. 11, 1995
Martin Decker, Ludwigshafen, DE;
Wolfgang Franzischka, Frankenthal, DE;
Rudolf Irnich, deceased, late of Bobenheim, DE;
Manfred Sauerwald, Meckenheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
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.