作者:Henry B. Sinclair
DOI:10.1016/0008-6215(88)84027-8
日期:1988.10
(3 mol. equiv.), to produce 1,5-anhydro-2,3,4-tri- O -benzoyl-6- O - p -tolylsulfonyl- d -mannitol. 1,5-Anhydro-2,3,4-tri- O -benzoyl-6-deoxy-6-iodo- d -mannitol ( 4 ) was prepared by displacing the p -tolylsulfonyl group by reaction with sodium iodide. 1,5-Diazabicyclo[5.4.0]undec-5-ene eliminated hydrogen iodide from 4 , to yield 1,5-anhydro-2,3,4-tri- O -benzoyl-6-deoxy- d - lyxo -hex-5-enitol (
摘要将d-甘露糖醇(1)转化为1,5-脱水-d-甘露糖醇,将其用对甲苯磺酰氯(1摩尔当量)和苯甲酰氯(3摩尔当量)连续处理,得到1 1,5-脱水-2,3,4-三-O-苯甲酰基-6-O-对甲苯磺酰基-d-甘露醇。通过与碘化钠反应置换对甲苯磺酰基来制备1,5-脱水-2,3,4-三-O-苯甲酰基-6-脱氧-6-碘-d-甘露糖醇(4)。1,5-二氮杂双环[5.4.0]十一碳烯从4除去碘化氢,生成1,5-脱水-2,3,4-三-O-苯甲酰基-6-脱氧-d-lyxo-hex -5-烯醇(5)。在碳酸钾存在的情况下,在5中将溴添加到甲醇溶液中,得到1-溴-1-脱氧-α-d-果糖吡喃糖苷(6)和1-溴-1-脱氧-β-甲基的可分离混合物。 d-果糖吡喃糖苷(8)。稀碱将6转化为甲基1,3-脱水-α-d-果糖吡喃糖苷,鉴定为其4,5-二乙酸盐。稀碱将8转化为甲基1,4-脱水-β-d-果糖吡喃糖苷。