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. 21, 1987
Filed:
Nov. 06, 1985
Applicant:
Inventors:
Karl J Herd, Odenthal, DE;
Karl H Schundehutte, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544299 ; 544303 ; 544309 ; 544313 ; 544334 ;
Abstract
2,4-Dihydroxypyrimidines of the formula ##STR1## with the substituent meanings given in the description, are obtained by reacting pyrimidines of the formula ##STR2## with the substituent meanings given in the description, with aqueous alkalis at elevated temperature. 2,4,5,6-Tetrachloropyrimidine is obtained from the dihydroxypyrimidines by reaction with agents which replace hydroxyl by chlorine.