Direct and stereoselective synthesis of β-d-mannosides using 4,6-O-benzylidene-protected mannosyl diethyl phosphite as a donor
作者:Toshifumi Tsuda、Ryoichi Arihara、Shinya Sato、Miyuki Koshiba、Seiichi Nakamura、Shunichi Hashimoto
DOI:10.1016/j.tet.2005.08.090
日期:2005.11
A direct and practical method for the construction of β-mannosidic linkages is described. While β-selectivities in the TMSOTf-promoted glycosidation of 2,3,4,6-tetra-O-benzyl-d-mannosyl diethyl phosphite are found to be highly dependent on the reactivity of acceptor alcohols, 2,3-di-O-benzyl-4,6-O-benzylidene-d-mannosyl diethyl phosphite reacts with a wide range of acceptor alcohols in the presence
描述了构建β-甘露糖苷键的直接和实用的方法。虽然发现在TMSOTf促进的2,3,4,6-四-O-苄基-d-甘露糖基亚磷酸二乙酯的糖基化反应中的β选择性高度依赖于受体醇的反应性,但2,3-二-O亚甲基-苄基-4,6- O-亚苄基-d-甘露糖基二乙基酯在TMSOTf存在下于-45°C在CH 2 Cl 2中与多种受体醇反应,以高收率得到β-甘露糖苷高β选择性。