Patents by Inventor Francois Rocquet

Francois Rocquet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the isomerization of derivatives of 3-vinyl-piperidine
    Patent number: 4238612
    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.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: December 9, 1980
    Assignee: Pharmindustrie
    Inventors: Jean-Jacques Barieux, Marie-Christine Dubroeucq, Francois Rocquet