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:
May. 25, 1999
Filed:
Feb. 20, 1996
Kandasamy Ramasamy, Laguna Hills, CA (US);
Arthur F Lewis, The Woodlands, TX (US);
Roland K Robins, deceased, late of Provo, UT (US);
Natarajan Raju, Kendall Park, NJ (US);
Ramesh Bharadwaj, Norwalk, CA (US);
Vjera Pejanovic, Belgrade, YU;
ICN Pharmaceuticals, Inc., Costa Mesa, CA (US);
Abstract
Novel procedures for obtaining ribo-C-nucleosides, including especially 2-.beta.-D-ribofuranosylthiazole-4-carboxylamide (tiazofirin) and 2-.beta.-D-ribofuranosylselenazole-4-carboxylamide (sylenazofurin) and synthesis intermediates thereof. The novel procedures involve introducing a cyano group at the 1' position of a ribose, directly or indirectly converting the cyano group to HN.dbd.C--OR.sub.1 or thicarboxylamide wherein R.sub.1 is a lower alkyl, forming the group which substituted for the cyano group into a heterocyclic ring containing an ester, and converting the ester into an amide.