4)-O-beta-D-galactopyranosyl-(1 leads to 4)-2-acetamido-2-deoxy-alpha -D-glucopyranose, the human blood-group P1-antigenic determinant. A similar sequence of reactions was performed starting from allyl 2-acetamido-3,6-di-O-benzyl-2-deoxy-beta-D-glucopyranoside, in order to prepare a derivative of this determinant suitable for linkage to carrier molecules.
已知的苄基2-乙酰
氨基-3,6-二-O-苄基-2-脱氧-4-O-(2,3,6-三-O-苄基-β-D-
吡喃半
乳糖基)-α-D-的缩合在2,4,6-三
甲基吡啶,
三氟甲磺酸银和
分子筛4A存在下,在
二氯甲烷中用2,3,4,6-四-O-苄基-α-D-
吡喃半
乳糖基
氯吡喃
葡萄糖苷和
分子筛4A得到苄基O-(2, 3,4,6-四-O-苄基-α-D-
吡喃半
乳糖基)-(1导致4)-O-(2,3,6-三-O-苄基-β-D-
吡喃半
乳糖基)-(1导致4)-2-乙酰
氨基-3,6-二-O-苄基-2-脱氧-α-
D-吡喃葡萄糖苷。催化氢解得到结晶的O-α-D-
吡喃半
乳糖基-(1导致4)-O-β-D-
吡喃半
乳糖基-(1导致4)-2-乙酰
氨基-2-脱氧-α-
D-吡喃葡萄糖血型P1抗原决定簇。从烯丙基2-乙酰
氨基-3,6-二-O-苄基-2-脱氧-β-
D-吡喃葡萄糖苷开始进行类似的反应顺序,