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:
Mar. 19, 2013
Filed:
Sep. 23, 2008
Applicants:
Jean-claude Vallejos, La Ciotat, FR;
Alain Schouteeten, Ezanville, FR;
Didier Wilhelm, Issy les Moulineaux, FR;
Inventors:
Jean-Claude Vallejos, La Ciotat, FR;
Alain Schouteeten, Ezanville, FR;
Didier Wilhelm, Issy les Moulineaux, FR;
Assignee:
Clariant Speciality Fine Chemicals (France), Nanterre, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 37/055 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for the synthesis of stilbene derivatives of formula (I)-(E) or (I)-(Z) in which R represents hydrogen or an OH group,by deprotection in the presence of an aluminum halide and of a tertiary amine of a compound of formula (II)-(E) or (II)-(Z) in which A represents hydrogen or an OR'group, and R, R, Rand R′independently represent an alkyl or aralkyl group.