作者:Lawrence A. Reed、Leon Goodman
DOI:10.1016/s0008-6215(00)85599-8
日期:1981.7
methyl thiolactoside derivative that could be selectively benzoylated to give 2,6,-di- O -benzoyl- S -(2,3,4,6-tetra- O -acetyl-β- d -galactopyranosyl)-4-thio-α- d -glucopyranoside ( 14 ), which was directly crystallized from a complex mixture of products produced in the coupling reaction. Selective acetolysis of the methyl glycoside linkage of 14 (or of the derived heptaacetate), followed by transesterification
摘要通过两种途径合成了潜在的酶诱导剂4- S-β-d-吡喃半乳糖基-4-硫代-d-吡喃葡萄糖,巯基乳糖(20)。从甲基α-d-吡喃半乳糖苷以高收率获得中间体2,3,6-三-O-苯甲酰基-4-S-氰基-4-硫代-α-d-吡喃葡萄糖苷(5)。衍生自5的甲基4-硫代-α-d-吡喃葡萄糖苷钠盐与2,3,4,6-四-O-乙酰基-α-d-吡喃半乳糖基溴化物在六甲基磷酸三酰胺中的反应生成甲基硫代乳糖苷衍生物可以被选择性地苯甲酰化,得到2,6,-二-O-苯甲酰基-S-(2,3,4,6-四-O-乙酰基-β-d-吡喃半乳糖基)-4-硫代-α-d-吡喃葡萄糖苷(14),直接从偶联反应中生成的复杂混合物产物中结晶出来。