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:
Apr. 27, 1999
Filed:
Dec. 03, 1997
Applicant:
Inventor:
Volker Kass, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544334 ;
Abstract
Process for the preparation of 2,4,6-trichloropyrimidine, characterized in that barbituric acid is reacted in a first reaction step with phosphorus oxychloride in the presence or absence of a catalyst, and then, in a second reaction step, is reacted with phosphorus pentachloride or with reactants forming this, in particular phosphorus trichloride and chlorine, at a temperature of 20 to below 80.degree. C.