Patents by Inventor Eric-Alain Denzler

Eric-Alain Denzler 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).

  • Preparation of N-alkenyl-2-aminomethyl-pyrrolidines
    Patent number: 4335045
    Abstract: An N-alkenyl-2-aminomethyl-pyrrolidine is prepared by firstly reacting tetrahydrofurfurylamine with gaseous hydrochloric acid and thionyl chloride to produce 2,5 dichloropentylamine hydrochloride. This is acetylized, possibly by acetyl chloride in dichloroethane in the presence of triethylamine, into N-acetyl-2,5-dichloropentylamine which is condensed with an alkenylamine into an N-alkenyl-2-acetylaminomethyl pyrrolidine from which the acetyl group is separated, for example by boiling with concentrated hydrochloric acid.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: June 15, 1982
    Assignee: Sachim S.A.
    Inventor: Eric-Alain Denzler