Fluorinated carbohydrates as potential plasma membrane modifiers. Synthesis of 3-deoxy-3-fluoro derivatives of 2-acetamido-2-deoxy-d-hexopyranoses
作者:Moheswar Sharma、Ralph J. Bernacki、Marilyn J. Hillman、Walter Korytnyk
DOI:10.1016/0008-6215(93)84174-5
日期:1993.2
2-acetamido- and 2-phthalimido-3-O-mesyl derivatives; when treated with fluoride nucleophile, these gave only the 2,3-aziridine derivative. However, treatment of the 2-azido-2-deoxy derivative with diethylaminosulfur trifluoride gave methyl 2-azido-2,3-dideoxy-3-fluoro-alpha-D-mannopyranoside which, after reduction, deprotection, and acetylation, gave the acetylated derivative of methyl 2-acetamido-2,3-dide
用三氟化二乙氨基硫处理苄基2-乙酰氨基-4,6-O-亚苄基-2-脱氧-α-D-吡喃果糖苷或用氟化四丁基铵处理3-O-甲磺酰基衍生物,得到2,3-不饱和化合物,而不是预期的3-脱氧-3-氟衍生物。当用氟化钾处理苄基2-乙酰氨基-4,6-二-O-苄基-2-脱氧-3-O-甲磺酰基-α-D-allopyran苷时,获得后者。将甲基2-叠氮基-4,6-O-亚苄基-2-脱氧-α-D-阿托吡喃糖苷转化为2-乙酰氨基-和2-邻苯二甲酰亚胺基-3-O-甲磺酰基衍生物。当用氟化物亲核试剂处理时,它们仅产生2,3-氮丙啶衍生物。但是,用三氟化二乙氨基硫处理2-叠氮基-2-脱氧衍生物可得到甲基2-叠氮基-2,3-二脱氧-3-氟-α-D-甘露吡喃糖苷,还原,脱保护和乙酰化后,以优异的产率得到2-乙酰氨基-2,3-二脱氧-3-氟-α-D-甘露吡喃糖苷甲基的乙酰化衍生物。这些乙酰化的3-氟衍生物在微摩尔浓度下对培养的鼠