Stereoselective α-Glucosylation with Tetra-<i>O</i>-benzyl-α-D-glucose and a Mixture of Trimethylsilyl Bromide, Cobalt(II) Bromide, Tetrabutylammonium Bromide, and a Molecular Sieve. A Synthesis of 3,6-Di-<i>O</i>-(α-D-glucopyranosyl)-D-glucose
作者:Shinkiti Koto、Naohiko Morishima、Chiharu Kusuhara、Shigeko Sekido、Toyosaku Yoshida、Shonosuke Zen
DOI:10.1246/bcsj.55.2995
日期:1982.9
A mixture of trimethylsilyl bromide, cobalt(II) bromide, tetrabutylammonium bromide, and a molecular sieve (4A) is effective for the stereoselective, one-stage α-glucosylation of alcohol with 2,3,4,6-tetra-O-benzyl-α-D-glucopyranose in dichloromethane. Using this procedure, several disaccharide derivatives as well as O-α-D-glucopyranosyl-(1→3)]-O-[α-D-glucopyranosyl-(1→6)]-D-glucopyranose are synthesized
三甲基溴化甲硅烷、溴化钴 (II)、溴化四丁基铵和分子筛 (4A) 的混合物可有效用于醇与 2,3,4,6-四-O-苄基的立体选择性、一步 α-葡萄糖基化-α-D-吡喃葡萄糖在二氯甲烷中。使用此程序,合成了几种二糖衍生物以及 O-α-D-吡喃葡萄糖基-(1→3)]-O-[α-D-吡喃葡萄糖基-(1→6)]-D-吡喃葡萄糖。