László Somsák, László Kovács, Viktor Gyóllai and Erzsébet Ősz
The title compounds give glycopyranosylidene-spiro-dioxolanes 3 and 4 in acetone and C-(1-methylsulfanylmethoxy-α-D-glycopyranosyl)formamides 5 in DMSO in the presence of Ag2CO3 and AgF, respectively.