Synthesis of methyl α-d-glucopyranosyl-(1→4)-α-d-galactopyranoside and methyl α-d-xylo-hex-4-ulopyranosyl-(1→4)-α-d-galactopyranoside
作者:Louis J. Liotta、Rita D. Capotosto、Rachel A. Garbitt、Brian M. Horan、Pamela J. Kelly、Andrew P. Koleros、Lisa M. Brouillette、Amy M. Kuhn、Sonia Targontsidis
DOI:10.1016/s0008-6215(01)00044-1
日期:2001.4
-glucopyranosyl-(1→4)-α- d -galactopyranoside (1) and methyl α- d -xylo-hex-4-ulopyranosyl-(1→4)-α- d -galactopyranoside (4) are reported. The keto-disaccharide 4 is of interest in our design, synthesis, and study of pectate lyase inhibitors. The key step in the syntheses was the high-yielding, stereospecific formation of methyl 4,6-O-benzylidene-2′,3′-di-O-benzyl-α- d -glucopyranosyl-(1→4)-2,3,6-tri-O-benzyl-α-
摘要甲基α-d-吡喃葡萄糖基-(1→4)-α-d-吡喃半乳糖苷(1)和甲基α-d-木糖己基-4-氟吡喃糖基-(1→4)-α-d-吡喃半乳糖苷的合成(4)报道。酮二糖4在我们设计,合成和研究果胶酸裂合酶抑制剂中很重要。合成的关键步骤是高产立体定向形成甲基4,6-O-亚苄基-2',3'-二-O-苄基-α-d-吡喃葡萄糖基-(1→4)-2, 3,6-三-O-苄基-α-d-吡喃半乳糖苷(15),其通过使2,3-二-O-苄基-4,6-O-亚苄基-d-吡喃葡萄糖基三氯乙酰亚氨酸酯(10)与在催化量的叔丁基二甲基甲硅烷基三氟甲烷磺酸盐(TMSOTF)存在下,合成2,3,6-三-O-苄基-α-d-吡喃半乳糖苷(14)。将化合物15水解生成二糖1或用NaBH3CN-HCl的1:1个四氢呋喃-醚,生成甲基2,3,6-三-O-苄基-α-d-吡喃葡萄糖基-(1→4)-2,3,6-三-O-苄基-α-d-吡喃半乳糖苷(2