Tris 10.03.2000 - 2 ″, 3 ', 4 ′, ethylidene - 4, 6' beta - d - glucopyranosides, their preparation and their use for the preparation of ethylidene beta - d - topically demethyl - 4 ′ -phosphate.

摘要

The compounds of the invention correspond to the formula 1 IMAGE The process for their preparation comprises the following stages: - acylation of a glycosyl derivative - acylation of an aglycone - coupling of the acylated glycosyl derivative and of the acylated aglycone in the presence of a Lewis acid, the acylation being performed with the aid of an acid chloride which is optionally identical for the two acylation stages, in which the carbon alpha to the carbonyl functional group carries at least one heteroatom chosen from O and S.