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:
Jul. 19, 2005
Filed:
Sep. 18, 2002
Pandurang Balwant Deshpande, Maharashtra, IN;
Parven Kumar Luthra, Chennai, IN;
Pratik Ramesh Sathe, Chennai, IN;
Sivakumaran Sundaravadivelan, Kanchipuram, IN;
Praveen Nagesh Ganesh, Chennai, IN;
Pandurang Balwant Deshpande, Maharashtra, IN;
Parven Kumar Luthra, Chennai, IN;
Pratik Ramesh Sathe, Chennai, IN;
Sivakumaran Sundaravadivelan, Kanchipuram, IN;
Praveen Nagesh Ganesh, Chennai, IN;
Orchid Chemicals and Pharmaceuticals Limited, Tamilnadu, IN;
Abstract
The present invention relates to a method for the preparation of cephalosporin antibiotic of the formula (II), which comprises hydrolyzing and halogenating the ester of formula (III)by photochemical irradiation in one pot using a halogenating agent in the absence or presence of a solvent, to produce compound of formula (I), activating the 4-halogeno-2-substitutedimino-3-oxo-butyric acid of formula (I) using conventional activation agents gives compound of formula (IV), condensing the activated compound of the formula (IV) with 7-amino cephem derivative of the formula (V) to produce a compound of formula (VI), and cyclizing the compound of formula (VI) with thiourea to give cephalosporin compounds of the formula (II).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile