4,6-Thioanhydro-hexopyranosides, synthesis and chemical behaviour of methyl 2-0-p-toluenesulfonyl-4,6-thioanhydro-α-d-gulopyranoside
作者:Dušan Miljković、Velimir Popsavin、János Harangi
DOI:10.1016/s0040-4020(01)96374-4
日期:1985.1
Methyl 4-0-benzoyl-6-bromo-6-deoxy-α-D-glucopyranoside (1, Figure 1) was converted, via the corresponding ditosylate 2, into methyl 2,3-di-0-p-toluenesulfonyl-4-0-benzoyl-6-S-acetyl-6-thio-α-D-glucopyranoside (3) by a selective nucleophilicdisplacement of 6-bromo-group with thioacetate. Unexpectedly, on treating the compound 3 with an excess of sodium methoxide in benzene-methanol (1:1) at room temperature