Patents by Inventor Hans Zutter

Hans Zutter 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 preparing purine compounds
    Patent number: 4602089
    Abstract: There are prepared compounds of the formulae ##STR1## where R is lower alkyl, chlorine, or bromine and n is an integer from 1 to 5. The compounds of formula (1) can be used to make erythro-9-(2-hydroxy-3-nonyl) hypoxanthine and its homologues and also to make the compounds of formulae (2) and (3). All three classes of compounds are useful as immunomodulators.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: July 22, 1986
    Assignee: Newport Pharmaceuticals, Inc.
    Inventors: Lionel N. Simon, Hans-Rudolf Mueller, Hans Zutter
  • Imidazole compounds
    Patent number: 4451478
    Abstract: There are prepared compounds of the formulae ##STR1## where R is lower alkyl, chlorine, or bromine and n is an integer from 1 to 5. The compounds of formula (1) can be used to make erythro-9-(2-hydroxy-3-nonyl) hypoxanthine and its homologues and also to make the compounds of formulae (2) and (3). All three classes of compounds are useful as immunomodulators.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: May 29, 1984
    Assignee: Newport Pharmaceuticals International, Inc.
    Inventors: Lionel N. Simon, Hans-Rudolf Mueller, Hans Zutter
  • Process for the resolution of (+)- and (-)-6-methoxy-.alpha.-methyl-2-naphthaleneacetic acid
    Patent number: 4246164
    Abstract: The subject of the invention is a process for resolving mixtures of (+)- and (-)-6-methoxy-.alpha.-methyl-2-naphthaleneacetic acid into the enantiomers thereof, characterized in that N-methyl-D-glucamine [=1-deoxy-1-(methylamino)-D-glucitol] is used as the resolving agent, so that the 6-methoxy-.alpha.-methyl-2-naphthaleneacetic acid is converted into the corresponding diastereoisomeric N-methyl-D-glucamine salt pair which, because of very different solubilities, can be separated easily and completely with high yield.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: January 20, 1981
    Assignee: Syntex Corporation
    Inventors: Ernst Felder, Davide Pitre, Hans Zutter