Patents by Inventor Fran.cedilla.ois Pruvost

Fran.cedilla.ois Pruvost 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).

  • Method for preparing substituted anthraquinone and application to the preparation of rheins
    Patent number: 6057461
    Abstract: The invention relates to a process for the preparation of substituted anthraquinones represented by the general formula (I): ##STR1## by Diels-Alder reaction between a 1,4-naphthoquinone of general formula (II): ##STR2## and an acyclic diene of formula (III):CH.sub.2 .dbd.CR--CH.dbd.CH--OR.sub.3 (III)followed by an oxidizing deprotection reaction by means of the Jones reagent, in order to obtain the substituted anthraquinone of general formula (I).Application to the preparation of rheins of use in pharmaceuticals.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: May 2, 2000
    Assignee: Girex
    Inventors: Cyril Estanove, Fran.cedilla.ois Pruvost
  • Process for the preparation of substituted anthraquinones and application in the preparation of rheins
    Patent number: 5948924
    Abstract: A process for the preparation of substituted anthraquinones is provided. The anthraquinones can be used to prepare pharmaceutically useful rheins.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: September 7, 1999
    Assignee: Girex (Societe Anonyme)
    Inventors: Cyril Estanove, Fran.cedilla.ois Pruvost