Combinations of N-phenylselenophthalimide (N-PSP) or iodosobenzene (PhIO) with Mg(ClO4)2 effectively promote glycosylation with thioglycosides under mild conditions. A 2,2,2-trichloroethoxycarbonyl group or trityl protecting group at the 6-position increased α-selectivity on glycosylation with 2-O-benzylated donors.
N-苯基
硒苯
肼酰胺(N-P
SP)或
碘苯(PhIO)与Mg(
ClO4)2的组合有效促进了在温和条件下与
硫糖苷的糖苷化反应。在6位引入2,2,2-三
氯乙氧基羰基基团或三苯基保护基团可以提高与2-O-苄基供体的糖苷化反应中的α选择性。