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:
Jun. 06, 2006
Filed:
Aug. 06, 2004
Applicants:
Max Braun, Wedemark, DE;
Uta Claassen, Hohenhameln, DE;
Inventors:
Max Braun, Wedemark, DE;
Uta Claassen, Hohenhameln, DE;
Assignee:
Solvay Fluor und Derivate GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of producing a halogen alkenone ether by attaching carboxylic acid halogenides or carboxylic acid anhydrides to a vinyl ether. According to the invention the method is carried out in the presence of an onium salt of a carbonic acid which can be regenerated. The resulting product is obtained in high yields. Alternatively, pyridine which is substituted by one, two or three C1–C3 alkyl groups or other onium salts can be used.