Patents by Inventor Franz Wenisch

Franz Wenisch 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 bicyclic enol-ethers, and novel ethers of 2-(3-hydroxyprop-l-yl)-cycloalkanones
    Patent number: 4268445
    Abstract: The preparation of bicyclic enol-ethers (I) ##STR1## (where n is from 3 to 12, and R.sup.1, R.sup.2 and R.sup.3 may be H or C.sub.1 --C.sub.4 -alkyl) by free radical adduct formation of CHR.sup.1 =CR.sup.2 --CHR.sup.3 --O--R.sup.4 (III)(where R.sup.4 is tert.-butyl, tetrahydrofuran-2-yl or tetrahydropyran-2-yl) with a cyclic ketone (IV) ##STR2## followed by acid-catalyzed cyclization, and novel compounds II ##STR3## The compounds (I) and (II) are intermediates for the synthesis of musk-like fragrances.
    Type: Grant
    Filed: January 31, 1980
    Date of Patent: May 19, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kropp, Frank Thoemel, Axel Nuerrenbach, Werner Hoffman, Franz Wenisch, Hartwig Fuchs