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. 07, 1988
Filed:
Apr. 13, 1987
Applicant:
Inventors:
Young S Lo, Richmond, VA (US);
William J Welstead, Jr, Richmond, VA (US);
Assignee:
A. H. Robins Company, Incorporated, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540557 ; 546308 ; 540495 ;
Abstract
A process is described wherein pyrido[1,4]benzodiazepines having the formula: ##STR1## wherein Q is NR.sup.1 R.sup.2 or ##STR2## are prepared from unsubstituted pyridobenzodiazepinones by alkylation reaction with halo-alkyl-Q followed by acylation of the other nitrogen; breaking the ring with an aryl Grignard reagent and recyclizing to add the aryl radical and form the azepine ring. Novel intermediates are thereby disclosed.
Lo, Young. (1988). Process for the preparation of aryl-pyrido(1,4) benzodiazepines (U.S. Patent No. 4749788). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4749788
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile