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,