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. 24, 2007
Filed:
Mar. 04, 2004
Arie Gutman, Haifa, IL;
Igor Zaltsman, Haifa, IL;
Anton Shalimov, Haifa, IL;
Maxim Sotrihin, Haifa, IL;
Gennady Nisnevich, Haifa, IL;
Lev Yudovich, Haifa, IL;
Irina Fedotev, Haifa, IL;
Arie Gutman, Haifa, IL;
Igor Zaltsman, Haifa, IL;
Anton Shalimov, Haifa, IL;
Maxim Sotrihin, Haifa, IL;
Gennady Nisnevich, Haifa, IL;
Lev Yudovich, Haifa, IL;
Irina Fedotev, Haifa, IL;
ISP Investments Inc., Wilmington, DE (US);
Abstract
The present invention provides a new and efficient process for the preparation of the dexmethylphenidate hydrochloride with high optical purity, the process comprising: The present invention further provides salt of (R,R)-N-Boc-ritalinic acid with (S)-1-phenylethylamine as new intermediate in the preparation of dexmethylphenidate hydrochloride.