Patents Assigned to SIPSY
  • Process for the preparation of steroids
    Patent number: 4269778
    Abstract: Process for the preparation of steroids.The steroid 21-thioesters are prepared by preparing the corresponding sulphonates in acetonic suspension and by reacting this suspension directly with a thiocarboxylate.Preparation of synthesis intermediates.
    Type: Grant
    Filed: November 20, 1979
    Date of Patent: May 26, 1981
    Assignee: SIPSY
    Inventors: Dieran R. Torossian, Gilbert G. Aubard