Patents by Inventor Kurt Ohnemus

Kurt Ohnemus 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).

  • 2-Alkyl-5-alkylsulfonyl-4,6-dihalopyrimidines and the production thereof
    Patent number: 4413124
    Abstract: The invention discloses novel 2-alkyl-5-alkylsulfonyl-4,6-dihalopyrimidines of the formula I ##STR1## wherein each of R.sup.1 and R.sup.2 independently is straight chain or branched chain C.sub.1 -C.sub.5 alkyl, and each of Y and Y.sup.1 is chlorine, fluorine or bromine. The compounds of the formula (I) can be obtained e.g. by reacting a 2-alkyl-4,6-dihydroxypyrimidine, in the presence of a chlorinating, brominating and/or fluorinating agent, with a dialkyl sulfoxide, and then oxidizing the compound obtained. The compounds of the formula (I) are valuable intermediates which are suitable e.g. for the manufacture of reactive dyes.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: November 1, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: Karl Hoegerle, Kurt Ohnemus
  • 2-Alkyl-5-alkyl sulfony 1-4,6-dihalopyrimidines and the production thereof
    Patent number: 4412074
    Abstract: The invention discloses novel 2-alkyl-5-alkylsulfonyl-4,6-dihalopyrimidines of the formula I ##STR1## wherein each of R.sup.1 and R.sup.2 independently is straight chain or branched chain C.sub.1 -C.sub.5 alkyl, and each of Y and Y.sup.1 is chlorine, fluorine or bromine. The compounds of the formula (I) can be obtained e.g. by reacting a 2-alkyl-4,6-dihydroxypyrimidine, in the presence of a chlorinating, brominating and/or fluorinating agent, with a dialkyl sulfoxide, and then oxidizing the compound obtained. The compounds of the formula (I) are valuable intermediates which are suitable e.g. for the manufacture of reactive dyes.
    Type: Grant
    Filed: December 10, 1981
    Date of Patent: October 25, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: Karl Hoegerle, Kurt Ohnemus