Reaction of chlorosulphonyl isocyanate with unsaturated sugars

Abstract
Treatment of hex-2-enopyranosides with chlorosulphonyl isocyanate gives 3-alkoxycarbonylamino-3-deoxyglycals. 1,2-O-Isopropylidene groups in sugars are removed by the reagent and 1,2-carbonates are formed.