Synthesis of heparin fragments. A chemical synthesis of the trisaccharide O-(2-deoxy-2-sulfamido-3,6-di-O-sulfo-α-d-glucopyranosyl)-(1→4)-O-(2-O-sulfo-α-l-idopyranosyluronic acid)-(1→4)-2-deoxy-2-sulfamido-6-O-sulfo-d-glucopyranose heptasodium salt
作者:Jean-Claude Jacquinet、Maurice Petitou、Philippe Duchaussoy、Isidore Lederman、Jean Choay、Giangiacomo Torri、Pierre Sinaÿ
DOI:10.1016/0008-6215(84)85281-7
日期:1984.7
-acetyl-2-azido-4- O -benzyl-2-deoxy-α- d -glucopyranosyl)-(1→4)- O -(methyl 2- O -acetyl-3- O -benzyl-α- l -idopyranosyluronate)-(1→4)-6- O -acetyl-3- O -benzyl-2-(benzyloxycarbonyl)amino-2-deoxy-α- d - glucopyranoside in 88% yield. O -Deacetylation with sodium hydroxide, followed successively by O -sulfation in N,N -dimethylformamide in the presence of sulfur trioxide-trimethylamine complex, catalytic
摘要首先将已知的3-O-苄基-1,2-O-异亚丙基-α-d-葡萄糖基呋喃糖转化为3-O-苄基-1,2-O-异亚丙基-β-1-基呋喃醛酸甲酯。酸水解,然后乙酰化并用四溴化钛处理,得到(2,4-二-O-乙酰基-3-O-苄基-α-1-吡喃吡喃基溴化)甲基脲酸酯,其立即被转化为4-O-甲基。乙酰基-3-O-苄基-β-1-氨基吡喃二酸酯1,2-(原乙酸叔丁酯)。用4-O-氯乙酰基进行两步取代4-O-乙酰基得到关键的衍生物结晶结晶3-O-苄基-4-O-氯乙酰基-β-1-氨基吡喃醛酸酯1,2-(叔-原乙酸正丁酯)。该原酸酯与过量的苄基6-O-乙酰基-3-O-苄基-2-(苄氧基羰基)氨基-2-脱氧-α-d-吡喃葡萄糖苷结晶在氯苯存在下缩合2,6-二甲基吡啶鎓高氯酸盐得到结晶的苄基6-O-乙酰基-3-O-苄基-2-(苄氧基羰基)氨基-2-脱氧-4-O-(甲基2-O-乙酰基-3-O-苄基-4- O-氯乙酰基-