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. 08, 2003
Filed:
Mar. 11, 2002
Applicant:
Inventors:
David Daqiang Xu, Whippany, NJ (US);
Wenming Liu, Parsippany, NJ (US);
Assignee:
Novartis AG, Basel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
C07D / ; C07D / ;
Abstract
The present invention relates to an improved process for preparing certain substituted caprolactam compounds which comprises acylating an aminocaprolactam compound with a lactone compound in the presence of a weak base and a polar, organic solvent, and hydrolyzing the resultant diamide compound in a mixture of solvents to obtain the desired caprolactam compound.