Patents by Inventor Ulrich Kampfen

Ulrich Kampfen 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 2-hydroxymethyl-pyrrolidine-3,4-diols
    Publication number: 20090155862
    Abstract: A process for the preparation of 2-hydroxymethyl-pyrrolidine-3,4-diols of the formulae: including the steps of: a) bioxidation of N-protected aminotetraols of the formula: b) deprotection of the corresponding 5-amino-5-deoxy-pentulose of the formula: and c) hydrogenation of the corresponding 5-amino-5-deoxy-pentulose of the formula:
    Type: Application
    Filed: February 18, 2009
    Publication date: June 18, 2009
    Inventors: Ulrich KAMPFEN, Eva Maria URBAN, Claus JESSEN, Martin CLAUSEN
  • Process for the preparation of -substituted formamides
    Patent number: 7268255
    Abstract: N-Aryl or N-heteroarylformamides are prepared by hydrogenating a corresponding nitroarene or nitroheteroarene with formic acid and/or ammonium formate as hydrogen donor and formylating agent in the presence of at least one noble metal-based hydrogenation catalyst and a vanadium or molybdenum compound as co-catalyst.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: September 11, 2007
    Assignee: Lonza AG
    Inventors: Ulrich Kampfen, Dario Veghini, Dominique Roberge, Jared Randall
  • Process for the preparation of n-substituted formamides
    Publication number: 20070037985
    Abstract: N-Aryl or N-heteroarylformamides are prepared by hydrogenating a corresponding nitroarene or nitroheteroarene with formic acid and/or ammonium formate as hydrogen donor and formylating agent in the presence of at least one noble metal-based hydrogenation catalyst and a vanadium or molybdenum compound as co-catalyst.
    Type: Application
    Filed: February 19, 2004
    Publication date: February 15, 2007
    Inventors: Ulrich Kampfen, Dario Veghini, Dominique Roberge, Jared Randall
  • Process for the preparation of 2-hydroxymethyl-pyrolidine 3, 4-diols
    Publication number: 20040185539
    Abstract: A process for the preparation of 2-hydroxymethyl-pyrrolidine-3,4-diols of the formulae comprising the steps of a) biooxidation of N-protected aminotetraols of the formula b) deprotection of the corresponding N-protected 5-amino-5-deoxy-pentulose c) hydrogenation of the corresponding 5-amino-5-deoxy-pentulose.
    Type: Application
    Filed: May 4, 2004
    Publication date: September 23, 2004
    Inventors: Ulrich Kampfen, Eva Maria Urban, Claus Jessen, Martin Clausen
  • Method for producing trifluoroacetoacetic acid anilides
    Patent number: 6136975
    Abstract: By a novel process, trifluoroacetoacet-anilides of the formula ##STR1## in which R.sup.1 is as defined in the description, can be prepared by reacting trifluoroacetoacetyl chloride with anilines of the formula ##STR2## if appropriate in the presence of an acid binder and if appropriate in the presence of a diluent.The compounds of the formula (I) are suitable intermediates for preparing herbicidally active uracil derivatives.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: October 24, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Lantzsch, Karl Steinbeck, Ulrich Kampfen
  • Process for the production of dimethylcyclopropanecarboxylic acid
    Patent number: 5149869
    Abstract: A process for the production or R,S-2,2-dimethylcyclopropanecarboxylic acid starting from isobutylene oxide and a phosphonoacetic acid trialkyl ester. In this way, first the R,S-2,2-dimethylcyclopropanecarboxylic acid-C.sub.1 -C.sub.4 alkyl ester is formed, which then is hydrolyzed to the corresponding acid. R,S-2,2-Dimethylcyclopropanecarboxylic acid is an important intermediate product for the production of S-(+)-2,2-dimethylcyclopropanecarboxamide.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: September 22, 1992
    Assignee: Lonza Ltd.
    Inventors: Thomas Meul, Ulrich Kampfen