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. 27, 1993
Filed:
Apr. 27, 1992
Applicant:
Inventor:
William D Dean, Arlington, TX (US);
Assignee:
American Cyanamid Company, Wayne, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07D / ;
U.S. Cl.
CPC ...
549261 ; 549253 ; 549254 ; 558373 ; 558406 ; 562465 ; 562484 ;
Abstract
A process for making acrylmaleic acid and arylmaleic anhydride derivative useful as intermediates for the preparation of arylmaleimides in the synthesis of compounds having activity in the central nervous system. The process involves reacting arylacetonitriles with glyoxylic acid to provide novel intermediate 3-aryl-3-cyanopropeneoates which may be converted to the arylmaleic acid and arylmaleic anhydride derivatives.