Patents Assigned to Cyathus Exquirere Pharmaforschungs GmbH
  • Method for producing 4,4?-(propane-1,2-diyl)-dipiperazine-2,6-dione
    Patent number: 8455641
    Abstract: A method for preparing compounds of the formula (I) by the cyclization of tetraacetic acid alkyl esters of the formula (II) in the presence of ammonia and formamide as well as to the compounds of the formula (II), which are used in this method.
    Type: Grant
    Filed: November 23, 2007
    Date of Patent: June 4, 2013
    Assignee: Cyathus Exquirere Pharmaforschungs GmbH
    Inventors: Andreas Koch, Erwin Neufellner
  • Novel Method for Producing 4,4-(1-Methyl-1,2-Ethanediyl)-BIS-(2,6-Piperazinedione)
    Publication number: 20100152447
    Abstract: A method for preparing compounds of the formula (I) by the cyclization of tetraacetic acid alkyl esters of the formula (II) in the presence of ammonia and formamide as well as to the compounds of the formula (II), which are used in this method.
    Type: Application
    Filed: November 23, 2007
    Publication date: June 17, 2010
    Applicant: Cyathus Exquirere Pharmaforschungs GmbH
    Inventors: Andreas Koch, Erwin Neufellner