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:
Sep. 12, 1989
Filed:
Jul. 13, 1987
Applicant:
Inventor:
Jyrki Lamsa, Oulu, FI;
Assignee:
Farmos-Yhtyma Oy, Turku, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
544323 ;
Abstract
A method for the preparation of 2,4-diamino-3-oxy-6-piperidyl-pyrimidine or minoxidil wherein a compound of the formula ##STR1## wherein R is a C.sub.1-4 alkyl or a phenyl group optionally having up to three C.sub.1-4 alkyl substituents, is oxidized to a compound of the formula ##STR2## which according to known methods is reacted with piperidine to minoxidil. In the inventive method magnesium monoperoxyphthalate, which has the formula ##STR3## is used as the oxidizing agent.