Patents by Inventor Hans Christian Stiasny

Hans Christian Stiasny 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 ortho-substituted arylmetal compounds and their reaction with electrophilic reagents
    Patent number: 6420584
    Abstract: Ortho-substituted arylmetal compounds are prepared by deprotonation of aromatics which have a hydrogen atom in the ortho position relative to at least one halogen atom, one trifluoromethoxy group, one dialkylamino group, one nitrile group, one alkoxy group or one dialkylamido group. The arylmetal compounds can then be reacted with electrophilic reagents. Deprotonation of the aromatics is carried out using alkyl- or arylmetal compounds or metal hydrides in the presence of a catalytic amount of a secondary metal amide.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: July 16, 2002
    Assignee: Merck Patent GmbH
    Inventors: Hans Christian Stiasny, Volker Reiffenrath
  • Process for the preparation of arylmetal compounds and their reaction with electrophilic reagents
    Patent number: 6207835
    Abstract: Arylmetal compounds are prepared by deprotonation of aromatics which have a hydrogen atom in the ortho position relative to a halogen atom or a trifluoromethoxy group, using a suitable base or by halogen-metal exchange of haloaromatics using a suitable metalating reagent. The arylmetal compounds are prepared in a continuous-flow reactor. The arylmetal compound can be further reacted with an electrophilic reagent.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: March 27, 2001
    Assignee: Merck KGaA
    Inventors: Volker Reiffenrath, Hans Christian Stiasny