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:
Dec. 09, 1980
Filed:
Mar. 21, 1979
Jean-Jacques Barieux, Villeurbanne, FR;
Marie-Christine Dubroeucq, Deuil-la Barre, FR;
Francois Rocquet, Viarmes, FR;
Pharmindustrie, Gennevilliers, FR;
Abstract
A process for the conversion of compounds of the formula: ##STR1## in which R is a hydrogen atom or a substituent and for which the carbon carrying the vinyl group has the rectus configuration, into the corresponding compounds of formula (I) for which the carbon carrying the vinyl group has the sinister configuration, and vice versa, which comprises subjecting a compound of formula (I) for which the carbon carrying the vinyl group has the rectus or sinister configuration, partially or entirely salified, to a heating at a temperature above 50.degree. C. in a protic solvent or a mixture of protic solvents in the presence or absence of formaldehyde, and isolating the compound of formula (I) for which the carbon carrying the vinyl group has the sinister or rectus configuration thus formed.