Reactions of 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl isothiocyanate (I) with various hydrazides gave 4-substituted 1-acylthiosemicarbazides. Their cyclization, by treatment with sodium methoxide, gave analogs of nucleosides. The reaction of (I with thioglycolic acid to give substituted 1,3-thiadiazolidine has also been studied.