Patents by Inventor Steffen Enke

Steffen Enke 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 ?-aminosubstituted carboxylic acid amides
    Patent number: 7166720
    Abstract: Hydroxy-imino derivatives of formula IIb are disclosed, in which R and R1 have the meanings given in the description.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: January 23, 2007
    Assignee: Merck Patent Gesellschaft
    Inventors: Thorsten Hartig, Steffen Enke
  • Process for the preparation of ?-aminosubstituted carboxylic acid amides
    Patent number: 7053211
    Abstract: The invention relates to a process for the preparation of ?-aminosubstituted carboxylic acid amide compounds and/or their salts comprising reacting a carboxylic acid amide of a primary amine with a nitrosylating agent in the presence of a base followed by hydrolysis to give a hydroxy imino derivative followed by hydrogenation and if necessary converting a base or acid of the ?-aminosubstituted carboxylic acid amide into one of its salts.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 30, 2006
    Assignee: Merck Patent GmbH
    Inventors: Thorsten Hartig, Steffen Enke
  • Process for the preparation of alpha-aminosubstituted carboxylic acid amides
    Publication number: 20060025587
    Abstract: The invention relates to a process for the preparation of ?-aminosubstituted carboxylic acid amide compounds and/or their salts comprising reacting a carboxylic acid amide of a primary amine with a nitrosylating agent in the presence of a base followed by hydrolysis to give a hydroxy imino derivative followed by hydrogenation and if necessary converting a base or acid of the ?-aminosubstituted carboxylic acid amide into one of its salts.
    Type: Application
    Filed: September 22, 2005
    Publication date: February 2, 2006
    Inventors: Thorsten Hartig, Steffen Enke
  • Process for preparing a trifluoroethoxy-substituted benzoic acid
    Patent number: 6849762
    Abstract: The invention relates to a method for the production of trifluoroethoxy-substituted benzoic acids, by reaction of a corresponding halogenated benzoic acid with trifluoroethanol in the solvent tetrahydrofuran, in the presence of a base and a copper salt, followed by an acidic work-up.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 1, 2005
    Assignee: Merck Patent GmbH
    Inventors: Kai Fabian, Steffen Enke, Herbert Tilly
  • Process for the preparation of alpha-aminosubstituted carboxylic acid amides
    Publication number: 20040034250
    Abstract: The invention relates to a process for the preparation of &agr;-aminosubstituted carboxylic acid amide compounds and/or their salts comprising reacting a carboxylic acid amide of a primary amine with a nitrosylating agent in the presence of a base followed by hydrolysis to give a hydroxy imino derivative followed by hydrogenation and if necessary converting a base or acid of the &agr;-aminosubstituted carboxylic acid amide into one of its salts.
    Type: Application
    Filed: May 29, 2003
    Publication date: February 19, 2004
    Inventors: Thorsten Hartig, Steffen Enke
  • Method for the production of trifluoroethoxy-substituted benzoic acids
    Publication number: 20030176721
    Abstract: The invention relates to a method for the production of trifluoroethoxy-substituted benzoic acids, by reaction of a corresponding halogenated benzoic acid with trifluoroethanol in the solvent tetrahydrofuran, in the presence of a base and a copper salt, followed by an acidic work-up.
    Type: Application
    Filed: November 21, 2002
    Publication date: September 18, 2003
    Inventors: Kai Fabian, Steffen Enke, Herbert Tilly