Patents by Inventor Rolande Leroy

Rolande Leroy 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).

  • Novel procedure for the preparation of activated nitrosocarbamates
    Patent number: 4883903
    Abstract: The subject of the invention is a novel procedure for the preparation of the compounds of formula I: ##STR1## in which n varies in particular from 2 to 5 and R represents Cl, Br or FZ represents in particular hydrogen, characterized in that the halogenoformate of formula II: ##STR2## R and n having the meanings indicated above, Y representing a halogen, is made to react with NH.sub.2 CH.sub.2 CH.sub.2 Cl to form the compound of formula Ia: ##STR3## in which R has the meanings indicated above, and in that the compound Ia is treated directly with nitrosylsulfuric acid.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: November 28, 1989
    Assignee: Sanofi
    Inventors: Pierre Roger, Jean-Paul Fournier, Rolande Leroy