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:
Jun. 20, 1989
Filed:
Oct. 26, 1988
Applicant:
Inventors:
Roberto P Giani, Locate Triulzi, IT;
Ettore Parini, Cologno Monzese, IT;
Giancarlo Tonon, Milan, IT;
Massimiliano Borsa, Vimodrone, IT;
Assignee:
Dompe' Farmaceutici S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540495 ; 514220 ;
Abstract
The present invention refers to an improved method for the preparation of 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-5-one in which the condensation between 2-chloronicotinic acid and o-phenylenediamine is carried out by refluxing in the presence of a solvent consisting of a cycloalkanol. The end product is in pure state and it may be utilized as such.