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:
Nov. 04, 1997
Filed:
Jun. 06, 1995
Applicant:
Inventors:
Bernard Belleau, deceased, late of Westmount, CA;
Tarek Mansour, Montreal, CA;
Allan Tse, Ville St-Laurent, CA;
Colleen A Evans, Montreal, CA;
Haolun Jin, Pierrefonds, CA;
Boulos Zacharie, Laval des Rapides, CA;
Nghe Nguyen-Ba, La Prairie, CA;
Assignee:
BioChem Pharma Inc., Laval, CA;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549 30 ;
Abstract
Disclosed are processes for preparing compounds of the formula (I) and pharmaceutically acceptable salts or esters thereof: ##STR1## wherein R.sub.2 is a purine or pyrimidine base or an analogue or derivative thereof; and Z is S, S.dbd.O or SO.sub.2. The invention also relates to intermediates of use in the preparation of these compounds.