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:
Jan. 31, 1995
Filed:
Dec. 15, 1993
Applicant:
Inventors:
Randall L De Jong, Zealand, MI (US);
Ronald E Seamans, Holland, MI (US);
James R Zeller, Holland, MI (US);
Assignee:
Warner-Lambert Company, Morris Plains, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07B / ;
U.S. Cl.
CPC ...
544280 ;
Abstract
An improved process for the preparation of 2-amino-3,5-dihydro-7-substituted-4H-pyrrolo[3,2-d]pyrimidin-4-ones is described wherein 2,6-diamino-3,5-dihydro-7-substituted-4H-pyrrolo[3,2-d]pyrimidin-4-one is converted to a diazonium salt which is subsequently catalytically hydrogenated to the desired compound, as well as valuable intermediates used in the process.