N-glycosides. 3. Reaction of 2,3-0-isopropylideneribofuranosylamine tosylate with 4-methyl-4-isothiocyanato-2-pentanone

The condensation of 2,3-0-isopropylideneribofuranosylamine tosylate with 4-methyl-4-isothiocyanato-2-pentanone in the presence of bases was studied. In pyridine the reaction gives a mixture of 3-(2,3-0-ispropylidene--D-ribofuranosyl)-4,6,6-trimethyl-1,2,3,6-tetrahydropyrimidine-2-thione and 3-(2,3-0-isopropylidene--D-ribofuranosyl)-4-methylene-6,6-dimethylhexahydropyrimidine-2-thione.See 1] for communication 2.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 244–246, February, 1984.