A facile synthesis of 2-acetamido-2-deoxy-4-O-α-l-fucopyranosyl-3-O-β-d-galactopyranosyl-d-glucopyranose, the Lewis a blood-group antigenic determinant, and related compounds
作者:Surjit S. Rana、Khushi L. Matta
DOI:10.1016/0008-6215(83)88079-3
日期:1983.6
2-acetamido-4,6- O -benzylidene-2-deoxy-3- O -(2,3,4,6-tetra- O -acetyl-β- d -galactopyranosyl)-α- d -glucopyranoside, the synthesis of methyl 2-acetamido-2-deoxy-4- O -α- l -fucopyranosyl-3- O -β- d -galactopyranosyl-α- d -glucopyranoside was accomplished by a similar reaction-sequence. The synthesis of 2-acetamido-2-deoxy-4- O -α- l -fucopyranosyl- d -glucopyranose is also described. The structures of the final
摘要研究了一种简单的苯甲基2-乙酰氨基-6-O-苄基-2-脱氧-3-O-(2,3,4,6-四-O-乙酰基-β-d-吡喃半乳糖基)的采购策略。 -β-d-葡萄糖吡喃糖苷(8)。苄基2-乙酰氨基-4,6-O-亚苄基-2-脱氧-3-O-(2,3,4,6-四-O-乙酰基-β-d-吡喃半乳糖基)-的乙缩醛环的还原性开放β-d-葡萄糖吡喃糖苷仅给出所需的关键中间体8。在溴离子的催化下,用2,3,4-三-O-苄基-α-1-呋喃核糖基溴对8进行岩藻糖基化,得到三糖衍生物,该三糖衍生物经O-脱乙酰化,然后氢解,产生标题三糖。从甲基2-乙酰氨基-4,6-O-亚苄基-2-脱氧-3-O-(2,3,4,6-四-O-乙酰基-β-d-吡喃半乳糖基)-α-d-吡喃葡萄糖苷开始,甲基2-乙酰氨基-2-脱氧-4-O-α-1-呋喃核糖基-3-O-β-d-吡喃半乳糖苷-α-d-吡喃葡萄糖苷的合成通过类似的反应顺序完成。还描述了2