作者:Najim A.L. Al-Masoudi、Neil A. Hughes
DOI:10.1016/0008-6215(86)80034-9
日期:1986.4
compounds 10 . Mild, acid hydrolysis converted 9 into the methyl 5-thio-α- and -⊙- d -altropyranosides and more vigorous hydrolysis gave 5-thio- d -altrose. Methyl 3,4- O -isopropylidene-5-thio-α- d altropyranoside was obtained when the 4,6-acetal 9a was left in acidified acetone. The methyl 2,3:4,6-di- O -isopropylidene-5-thio-α- and -β- d -glucopyranosides were quickly produced by the action of acidified
摘要酸催化6-O-乙酰基-5-S-乙酰基-1,2-O-异亚丙基-5-硫基-3-硫代-O-甲苯-对磺酰基-α-d-葡糖呋喃糖的甲醇分解反应得到甲基5-甲基硫代-3-O-甲苯-对-磺酰基-α-和-β-d-吡喃葡萄糖苷(5)。用酸化的2,2-二甲氧基丙烷然后用甲醇钠处理5,得到甲基2,3-脱水-4,6-O-亚异丙基-5-硫代-α-和-β-d-吡喃果糖苷。然后用氢氧化钠水溶液将环氧打开,得到甲基4,6-O-异亚丙基-5-硫代-α-或-β-d-α-吡喃二糖苷(9)和相应的葡萄糖化合物10的混合物。轻度酸水解将9转化为甲基5-硫代α-和-α-d-α-吡喃糖苷,剧烈水解后得到5-硫代d-altrose。当将4,6-缩醛9a留在酸化的丙酮中时,得到甲基3,4-O-异亚丙基-5-硫代-α-d萘并吡喃糖苷。甲基2,3:4,6-二-O-异亚丙基-5-硫代-α-和-β-d-吡喃葡萄糖苷是通过酸化的2,2-二甲氧基丙烷在4