Reaction of D-fructose, D-glucose and inulin with alcohols in the presence of iodine; a novel glycosidation procedure

Solvent Polarity-Controlled Selective Synthesis of Methyl Pyranoside and Furanoside

A selective synthesis of methyl d-glucopyranoside or furanoside has been developed using 2,4,6-trichloro-1,3,5-triazine (TCT)-activated DMSO and d-glucose in methanol. At higher concentrations of DMSO, only pyranoside was formed and at lower concentrations of DMSO, only furanoside was formed. This method was also successfully applied to other sugars. In terms of reaction rates, selectivities, and yields, this method is better than most of the currently used methods.

Iodine-promoted ribosylation leads to a facile acetonide-forming reaction

Iodine not only promotes smooth beta-selective glycosylation of ribose tetra-acetate under exceptionally mild conditions, it also catalyzes an expedient acetonide-forming reaction in this system when dry acetone is used as a solvent.