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. 17, 1984
Filed:
Apr. 21, 1981
Applicant:
Inventor:
Peter Hofer, Liestal, CH;
Assignee:
The Purdue Frederick Company, Norwalk, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548543 ; 548551 ;
Abstract
Pyrrolidin-2-ones are produced by hydrogenation of 3-pyrrolin-2-ones, which latter compounds could not prior to this invention be easily obtained. These 3-pyrrolin-2-ones with various substituents are produced by ring closure of N-aroylmethyl-acetamides. The ring closure is effected in basic media under nitrogen.