Patents by Inventor Manfred Stahnke

Manfred Stahnke 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 preparation of 17.alpha.-(3-iodobenzoyloxy)-9.alpha.-chloro-4-pregnene-3,20-diones and their D-homo homologs
    Patent number: 4260464
    Abstract: Novel 17.alpha.-(3-iodobenzoyloxy)-9.alpha.-chloro-4-pregnene-3,20-diones and the D-homo homologs thereof, of the formula ##STR1## wherein n is 1 or 2;C.sub.1 -----C.sub.2 represents a C--C single or C.dbd.C double bond;R.sub.1 is hydrogen, hydroxy, or lower acyloxy;R.sub.2 is hydrogen or methyl;R.sub.3 is hydrogen, methyl or fluorine; andwhen n is 1, C.sub.15 -----C.sub.16 represents a C--C single or C.dbd.C double bond; and when n is 2, C.sub.16 -----C.sub.17 represents a C--C single or C.dbd.C double bond;which have valuable pharmacological properties and also serve as intermediates in the preparation of known pharmacologically active compounds, can be prepared by irradiating a 17.alpha.-(3-iodobenzoyloxy)-4-pregnene-3,20-dione or a D-homo homolog thereof of the formula ##STR2## with long wavelength ultraviolet radiation in the presence of phenyliodine dichloride.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: April 7, 1981
    Assignee: Schering Aktiengesellschaft
    Inventors: Ulrich Kerb, Manfred Stahnke, Rudolf Wiechert