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:
Jul. 01, 2003
Filed:
Apr. 26, 2002
Applicant:
Inventors:
Nongyuan Shi, Hanau, DE;
Bernd Drapal, Alzenau, DE;
Steffen Krill, Speyer, DE;
Markus Julino, Hanau, DE;
Klaus Huthmacher, Gelnhausen, DE;
Assignee:
Degussa AG, Duesseldorf, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 4/571 ; C07C 4/568 ;
U.S. Cl.
CPC ...
C07C 4/571 ; C07C 4/568 ;
Abstract
A process for the preparation of &bgr;,&ggr;,&dgr;-unsaturated ketones and/or &agr;,&bgr;,&ggr;,&dgr;-unsaturated ketones by the reaction of an unsaturated alcohol with an enol ether or mixture of enol ethers, with formation of ketals as a by-product, at temperatures of from 50° C. to 200° C., in the presence of an acid catalyst, whereby one or all of the reagents is/are heated to the reaction temperature of from 50° C. to 200° C. before the acid catalyst is added.