Patents by Inventor Reiner Ramert

Reiner Ramert 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 preparing 2-amino-6-chloropurine
    Patent number: 5663338
    Abstract: The present invention relates to a new and improved process for preparing 2-amino-6-chloropurine comprising the step of reacting guanine in the presence of ammonium sulphate with hexamethyldisilazane. The process of this invention advantageously results in a high yield of 2-amino-6-chloropurine and may be carried out on a laboratory or an industrial scale.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: September 2, 1997
    Assignee: Boehringer Ingelheim KG
    Inventors: Reiner Ramert, Rainer Sobotta
  • Process for preparing 2-chloro-1,7-dihydropurin-6-one and a process for its purification
    Patent number: 5264573
    Abstract: A process for the preparation of 2-chloro-1,7-dihydropurin-6-one which comprises the steps of:a) suspending 2-thioxanthine in concentrated hydrocloric acid, to produce a suspension; andb) contacting the suspension with chlorine, to produce 2-chloro-1,7-dihydropurin-6-one.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: November 23, 1993
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Reiner Ramert, Albrecht Christmann