Synthesis of 6-amino-2,5-anhydro-6-deoxy- and -1,6-dideoxy-d-glucitol and some derivatives thereof
作者:János Kuszmann、Péter Dvortsák
DOI:10.1016/0008-6215(83)88478-x
日期:1983.11
expected 6-deoxy derivative, the (acyclic) 5-enoalditol. The synthesis of 44 was conducted via 2,5-anhydro-1,6-di-O-tosyl- d -mannitol (36), which was obtained from 1,6-di-O-benzoyl-3,4-O-isopropylidene- d -mannitol in satisfactory yield. Ditosylate 36 was converted into a 2,5:3,6-dianhydro monotosylate which, on reduction with lithium aluminum hydride, gave the 1-deoxy derivative. Opening of the 3
摘要以d-甘露醇为原料,合成了6-氨基-2,5-脱水-6-脱氧-和-1,6-二脱氧-d-葡萄糖醇(44)及其衍生物。将3,4-二-O-烯丙基-1,2:5,6-二脱水-d-甘露糖醇转化为2,5-脱水-6-溴化合物8,其溴原子被叠氮化物代替。通过在乙醇-乙酸-水中用PdC处理除去烯丙基,并用硫化氢-吡啶还原叠氮基。通过使用甲醛-甲酸将形成的氨基甲基化,得到1-N-6-O-亚甲基化合物为主要产物,其对硼氢化物的还原具有抗性。用乙酸中的活化锌处理8,而不是预期的6-脱氧衍生物,得到(无环)5-烯醛醇。44的合成是通过2,5-脱水-1,6-二-O-甲苯磺酰基-d-甘露醇(36)进行的,由1,6-二-O-苯甲酰基-3,4-O-异亚丙基-d-甘露糖醇以令人满意的产率获得。将二甲苯磺酸酯36转化为2,5:3,6-二脱水单甲苯磺酸酯,将其用氢化铝锂还原后得到1-脱氧衍生物。用氢溴酸打开3,6-脱水环导致生