Chemical synthesis of the trisaccharide unit of the species-specific phenolic glycolipid from Mycobacterium leprae
作者:Tsuyoshi Fujiwara、Gerald O. Aspinall、Shirley W. Hunter、Patrick J. Brennan
DOI:10.1016/0008-6215(87)80163-5
日期:1987.6
anosyl bromide or related disaccharides. Anomeric mixtures of the trisaccharide derivatives were separated by preparative t.l.c., deacetylated, and hydrogenolyzed, to give the pure trisaccharides. It had already been demonstrated that only those trisaccharides containing an intact, terminal 3,6-di-O-methyl-beta-D-glucopyranosyl unit are effective in inhibiting the specific binding between PGL-I and
O-(3,6-二-O-甲基-β-D-吡喃吡喃糖基)-(1 ---- 4)-O-(2,3-二-O-甲基-α-L-鼠李糖基吡喃糖基)-( 1-2)-3-O-甲基-L-鼠李吡喃糖,麻风分枝杆菌特异性酚糖脂I(PGL-1)抗原的半抗原三糖和相关三糖是通过将O-2苯甲基4-O-苄基-α-L-鼠李吡喃糖苷使用相转移催化,产物甲基化,脱烯丙基作用并偶联至O-(2,4-di-O-乙酰基-3,6-di-O-甲基-β-D-吡喃吡喃糖基)-(1 ---- 4)-2,3-二-O-甲基-L-鼠李糖吡喃糖基溴化物或相关二糖。将三糖衍生物的端粒混合物通过制备性tlc分离,脱乙酰基并进行氢解,得到纯净的三糖。已经证明,只有那些完整的末端3的三糖,