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:
Feb. 21, 2006
Filed:
Aug. 13, 2003
Applicants:
Thomas Güthner, Trostberg, DE;
Doris Krammer, Truchtlaching, DE;
Inventors:
Thomas Güthner, Trostberg, DE;
Doris Krammer, Truchtlaching, DE;
Assignee:
Degussa AG, Trostberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 229/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process is described for preparing 3-amino-4,4,4-trifluorocrotonic esters of the formula (I) or the E/Z isomers or tautomeric forms thereofwhere Rand Rare each independently hydrogen, an optionally substituted linear C–C-alkyl radical or an optionally substituted benzyl radical and Ris methyl or ethyl, which comprises With the aid of this two-stage process, the 3-amino-4,4,4-trifluorocrotonic esters can be prepared in high yields without significant by-products.