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:
Mar. 11, 1986
Filed:
Apr. 16, 1984
Applicant:
Inventors:
Assignee:
I.S.F. S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544224 ; 534753 ;
Abstract
Preparation of ethyl {6-[ethyl-(2-hydroxypropyl)amino]-3-pyridazinyl} hydrazino carboxylate is disclosed from 3-chloro-6-hydrazinopyridazine in protected form, which is oxidized to yield the corresponding azo derivative, which is treated with ethyl-(2-hydroxypropyl)amine in the presence of strong bases, the corresponding amino derivative being subjected to reduction and deprotection, and finally acylated to yield ethyl {6-[ethyl-(2-hydroxypropyl)amino]-3-pyridazinyl} hydrazinocarboxylate.