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:
Jan. 08, 2013
Filed:
Jun. 02, 2009
Dharmaraj Ramachandra Rao, Maharashtra, IN;
Rajendra Narayanrao Kankan, Maharashtra, IN;
Maruti Ghagare, Maharashtra, IN;
Sandip Vasant Chikhalikar, Maharashtra, IN;
Dharmaraj Ramachandra Rao, Maharashtra, IN;
Rajendra Narayanrao Kankan, Maharashtra, IN;
Maruti Ghagare, Maharashtra, IN;
Sandip Vasant Chikhalikar, Maharashtra, IN;
CIPLA Limited, Mumbai, IN;
Abstract
The present invention provides a compound of formula (IV) wherein R is Cl, Br, NO, OH or OR', and R′ is alkyl, and its use in the synthesis of levocetirizine, including its use in the synthesis of (−)-1-[(4-chlorophenyl)-phenylmethyl]piperazine, an intermediate useful in the synthesis of levocetirizine. The present invention also provides compounds (II) and (III) which are useful in the synthesis of compound (IV).