Condensation of 2,4-dimethoxy pyrimidine with bromoglucosides derived from methyl 4-deoxypentopyranosides2–7and from 3,5,6-tri-O-benzoyl glucofuranose,20, leads in a stereospecific manner to the nucleosides8–13and22with thetrans1′,2′ configuration. The stereochemistry of this reaction is ...