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:
Mar. 23, 2010
Filed:
Oct. 31, 2006
Pandurang Balwant Deshpande, Vadodara, IN;
Kishore Khemani, Vadodara, IN;
Bharat Becharbhai Boda, Vadodara, IN;
Tushar Rajnikant Shah, Vadodara, IN;
Hitarth Harshendu Acharya, Vadodara, IN;
Parven Kumar Luthra, Vadodara, IN;
Pandurang Balwant Deshpande, Vadodara, IN;
Kishore Khemani, Vadodara, IN;
Bharat Becharbhai Boda, Vadodara, IN;
Tushar Rajnikant Shah, Vadodara, IN;
Hitarth Harshendu Acharya, Vadodara, IN;
Parven Kumar Luthra, Vadodara, IN;
Alembic Limited, Gujarat, IN;
Abstract
The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R=R=H or R=H and R=CHor an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).