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:
Dec. 15, 2009
Filed:
Nov. 20, 2002
Nagarajan Kuppuswamy, Bangalore, IN;
Sivaramakrishnan Hariharan, Bangalore, IN;
Arulselvan Mariadas, Bangalore, IN;
Nagarajan Kuppuswamy, Bangalore, IN;
Sivaramakrishnan Hariharan, Bangalore, IN;
Arulselvan Mariadas, Bangalore, IN;
Hikal Limited, Bangalore, IN;
Abstract
The present invention provides an improved process for the preparation of gabalactam of formula 1 that includes preparing an aqueous solution of an alkali or alkaline earth metal hydroxide, adding bromine to the resulting solution to give an appropriate alkali or alkaline earth metal hypobromite; adding an amide of the formula 4 aging the resultant mixture; heating the mixture to a temperature in a range of 80 to 100 degrees C.; extracting with nonpolar solvent and distilling under reduced pressure to obtain gabalactam.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile