The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1978
Filed:
Oct. 18, 1976
Applicant:
Inventors:
Michael C Vander Zwan, Somerset, NJ (US);
Donald F Reinhold, North Plainfield, NJ (US);
Assignee:
Merck & Co., Inc., Rahway, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544277 ; 260154 ;
Abstract
The present invention relates to a novel and useful process for preparing 4,6-diamino-5-arylazopyrimidine from an arylazomalononitrile in the presence of ammonium chloride and formamide. If desired, the 4,6-diamino-5-arylazopyrimidine may then be hydrogenated to form 4,5,6-triaminopyrimidine which, when the hydrogenation is carried out in the presence of formic acid or its derivative, gives adenine.