Synthesis of the methyl 3-amino-3-deoxy-α- and β-d-allopyranosides and -allofuranosides
作者:Hans H. Baer、Yuchen Gan
DOI:10.1016/0008-6215(91)80125-7
日期:1991.3
methanolysis of the azido diacetal gave methyl 3-azido-3-deoxy-β- and -α-d-allopyranosides and the corresponding β-d-allofuranoside, with a 3:1 pyranoside to furanoside ratio; the two amino β-glycosides were then obtained by catalytic hydrogenation. Methanolysis of the 3-acetamido-3-deoxy-α-d-allofuranose diacetal produced a glycoside mixture composed mainly of methyl 3-amino-3-deoxy-β- and -α-d-allofuranosides
由甲基2-O-苯甲酰基-4,6-O-亚苄基-α-d-吡喃葡萄糖苷按5步顺序合成甲基3-氨基-3-脱氧-α-d-吡喃果糖苷,涉及三氟甲基磺酰化,叠氮化物置换,脱保护,以及催化加氢。用叠氮化四甲基胍取代后,将1,2:5,6-二-O-异亚丙基-α-d-呋喃葡萄糖3-三氟甲磺酸酯提供相应的3-叠氮基-3-脱氧-α-d-呋喃呋喃糖二缩醛,将其转化为3-氨基和3-乙酰氨基产物。叠氮基二缩醛的酸催化甲醇分解得到甲基3-叠氮基-3-脱氧-β-和-α-d-吡喃葡糖苷以及相应的β-d-呋喃呋喃糖苷,吡喃糖苷与呋喃糖苷的比例为3:1。然后通过催化氢化获得两个氨基β-糖苷。