ALPHA ANOMER ENRICHED MIXTURE OF 3,5-BIS (PROTECTED HYDROXY)-2- DEOXY-2,2- DIFLUORO-D- RIBOFURANOSYL-1- ALKYL- (OR ARYL)- SULFONATES AND THEIR PREPARATION AT LOW TEMPERATURES

摘要

An alpha-anomer enriched ribofuranosyl derivative of the formula wherein each X is independently selected from hydroxy protecting groups and Y is selected from the group consisting of alkylsulfonyloxy, arylsulfonyloxy, substituted alkylsulfonyloxy and substituted arylsulfonyloxy. It is an intermediate for anti-viral and anti-neoplastic agents. 3590 כ" ח בשבט התשס" ב - February 10, 2002