Patents by Inventor Hanfried Arnold

Hanfried Arnold 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).

  • Patent number: 4871482
    Abstract: 1-Methylandrosta-1,4-diene-3,17-dione is prepared by a process wherein a 3-enol ester or 3-enol ether of general Formula II ##STR1## wherein R.sub.1 is an alkyl residue of 1-3 carbon atoms or an acyl or trialkylsilyl group of up to 10 carbon atoms in the group, is converted into the 2-bromo steroid of Formular III ##STR2## wherein the bromine substituent can be in the .alpha.- as well as in the .beta.-position, and the compound of general Formula III is converted into 1-methylandrosta-1,4-diene-3,17-dione.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: October 3, 1989
    Assignee: Schering Aktiengesellschaft
    Inventors: Klaus Nickisch, Hanfried Arnold
  • Patent number: 4599200
    Abstract: A multistep process for production of 17.alpha.-acetoxy-1,2-methylene-4,6-pregnadiene-3,20-dione involves ketalization of the 20-keto group of 17.alpha.-hydroxy-1,4,6-pregnatriene-3,20-dione, then methylenation in the 1,2-position with trimethylsulfoxonium iodide, hydrolysis and simultaneous acetylation of the 17.alpha.-hydroxy group.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: July 8, 1986
    Assignee: Schering Aktiengesellschaft
    Inventor: Hanfried Arnold
  • Patent number: 4113751
    Abstract: Alkali metal salts of estrogen hemisulfates are stabilized with sodium acetate.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: September 12, 1978
    Assignee: Schering Aktiengesellschaft
    Inventor: Hanfried Arnold
  • Patent number: 4021458
    Abstract: 3-Hemisulfate sodium salts of 17.alpha.-hydroxy steroids of the formula ##STR1## wherein R.sub.1 is H, CH.sub.3 or C.sub.2 H.sub.5 and .DELTA. is one or more additional double bonds optionally present in the B and/or C rings are produced by treating a 17-mono ester of a carboxylic acid of up to 15 carbon atoms of the corresponding 3,17.alpha.-dihydroxy steroid with the reaction product of pyridine or like amine and sulfur trioxide or reactive functional derivative thereof and, without isolation thereof, saponifying the resultant reaction product with alkali, preferably a sodium alcoholate or hydroxide in a lower alcohol.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: May 3, 1977
    Assignee: Schering Aktiengesellschaft
    Inventors: Hanfried Arnold, Jean-Claude Hilscher, Reinhold Wieske