Patents by Inventor Winfried Hertzsch

Winfried Hertzsch 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).

  • Cis, endo-2-azabicycloalkane-3-carboxylic acid derivatives
    Patent number: 5550255
    Abstract: The invention relates to compounds of the formula I ##STR1## in which n is 1, 2 or 3,Z.sup.1 and Z.sup.2, and Z.sup.3 and Z.sup.4, in each case together represent a chemical bond orZ.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 in each case represent hydrogen,Z.sup.1 and Z.sup.2 being in the cis configuration relative to one another and the COR.sup.1 group on C atom 3 being in the endo configuration relative to the bicyclic ring system,R.sup.1 denotes hydroxyl, alkoxy, aralkoxy, amino, alkylamino or dialkylamino andR.sup.2 denotes hydrogen, alkyl, aryl, aralkyl, cycloalkyl or alkylcycloalkyl,processes for their preparation and their use.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: August 27, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hansj org Urbach, Rainer Henning, Winfried Hertzsch
  • Process for the preparation of 2-acylamino-6-halopurine from 2,9-diacylguanine
    Patent number: 5434263
    Abstract: 2-Acylamino-6-halopurine can be prepared by halogenation of 2,9-diacylguanine (2-acylamino-6-oxo-9-acylpurine) with phosphorus oxychloride or phosphorus oxybromide in the presence of a base and of a salt with subsequent hydrolysis of the reaction product.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: July 18, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Winfried Hertzsch
  • Process for the preparation of acylals
    Patent number: 5231221
    Abstract: Compounds of the formula ##STR1## can advantageously be prepared by reacting compounds the formula II ##STR2## in which the substituents R.sup.1 -R.sup.4 have the meanings given, with the anhydride of the formula III ##STR3## in the presence of dimethyl sulfoxide and the acid corresponding to the anhydride of the formula III.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: July 27, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Winfried Hertzsch, Gerhard Jahne
  • Cis,endo-2-azabicycloalkane-3-carboxylic acid derivatives, their use and intermediates in their preparation
    Patent number: 4886827
    Abstract: The invention relates to compounds of the formula I ##STR1## in which n is 1, 2 or 3,Z.sup.1 and Z.sup.2, and Z.sup.3 and Z.sup.4, in each case together represent a chemical bond orZ.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 in each case represent hydrogen,Z.sup.1 and Z.sup.2 being in the cis configuration relative to one another and the COR.sup.1 group on C atom 3 being in the endo configuration relative to the bicyclic ring system,R.sup.1 denotes hydroxyl, alkoxy, aralkoxy, amino, alkylamino or dialkylamino andR.sup.2 denotes hydrogen, alkyl, aryl, aralkyl, cycloalkyl or alkylcycloalkyl,processes for their preparation and their use.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: December 12, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hansjorg Urbach, Rainer Henning, Winfried Hertzsch