Stereoselectivity in the Oxidation of 5-Thioglucose Derivatives with 3-Chloroperoxybenzoic Acid
作者:Hideya Yuasa、Akio Takenaka、Hironobu Hashimoto
DOI:10.1246/bcsj.63.3473
日期:1990.12
5-Thio-α-D-glucopyranose derivatives were oxidized with 3-chloroperoxybenzoic acid in various conditions to give axial and equatorial sulfoxides. Structure of an axial sulfoxide obtained was determined by X-ray crystallography. Configuration of other sulfoxides was determined by 1HNMR spectroscopy according to empirical rules of chemical shift. The anomeric substituent was decisive for the stereoselectivity and the
Sulfur participation in methanolysis and acetolysis of 5-deoxy-5-thio-D-glucose derivatives
作者:Hironobu Hashimoto、Hideya Yuasa
DOI:10.1016/s0040-4039(00)82084-5
日期:1988.1
Acid methanolysis of 5-deoxy-5-thio-D-glucose derivatives gave the 4-O-methyl glycoside and the 4,6-di-O-methylated dimethyl acetal , indicating transannular participation of the sulfur atom. Similarly, acetolysis of the corresponding per-O-alkylated glucosides gave the 1,4-diacetates, and .