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:
Nov. 09, 1999
Filed:
Jan. 15, 1999
Applicant:
Inventors:
Laurens Wilhelm van den Akker, Karel Doormanlaan, NL;
Monika Brink, Strasse, DE;
Assignee:
American Cyanamid Company, Madison, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568323 ; 568316 ;
Abstract
An effective and efficient process for the preparation of chloro-benzoylchlorides of formula I, ##STR1## (n is defined in the specification). In this process a a chloro-trichloromethylbenzene of formula II ##STR2## is treated with water acid in the presence of a Lewis at temperatures below 80.degree. C. The compounds obtained according to this process can be used to prepare certain chloro-substituted benzophenones.