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:
Jul. 18, 1995
Filed:
Oct. 26, 1990
Applicant:
Inventor:
Winfried Hertzsch, Frankfurt am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544264 ; 544277 ;
Abstract
2-Acylamino-6-halopurine can be prepared by halogenation of 2,9-diacylguanine (2-acylamino-6-oxo-9-acylpurine) with phosphorus oxychloride or phosphorus oxybromide in the presence of a base and of a salt with subsequent hydrolysis of the reaction product.