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:
Aug. 02, 1994
Filed:
Mar. 31, 1993
Applicant:
Inventors:
Dieter Kaufmann, Bergisch Gladbach, DE;
Carsten Hesse, Leverkusen, DE;
Thomas Himmler, Odenthal, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560104 ; 558401 ; 562495 ; 564182 ;
Abstract
Cinnamic acid derivatives, in particular 2-ethylhexyl p-methoxycinnamate and 2-isoamyl p-methoxycinnamate, are prepared avoiding particular effort for workplace hygiene and ecology by using bromoaromatic and acrylic acid derivatives in the presence of palladium catalysts and a large excess of phosphane (based on the palladium), in the presence of an inorganic base and in the presence of alcohols and/or a phase transfer catalyst.