corresponding α-D-glucopyranose-type glycosyl donor 9/10 reacted at room temperature with protected nucleosides 12–15 in CH2Cl2 solution in the presence of BF3⋅OEt2 as promoter to give 5′-O-(2-azido-2-deoxy-α-D-glycosyl)nucleosides in reasonable yields (Schemes 2 and 3). Only the 5′-O-(α-D-mannopyranosyl)nucleosides were obtained. Compounds 21, 28, 30, and 31 showed growth inhibition of HeLa cells and hepatoma
1,3,4,6-四-O-乙酰基-2-
叠氮基-2-脱氧-β -D-甘露
吡喃糖(4)或1,3,6-三-O-乙酰基-2-
叠氮基的混合物-2-脱氧-4- ö - (2,3,4,6-四ö乙酰基β -D-
吡喃半
乳糖基) - β -D-
吡喃
甘露糖(10)和相应的α -
D-吡喃葡萄糖型的糖基供体9 / 10与受保护的核苷在室温下反应12 - 15在CH 2
氯2在BF的存在溶液3 ⋅OEt 2作为启动子以合理的产率得到5'- O-(2-
叠氮基-2-脱氧-α -D-糖基)核苷(方案2和3)。仅获得5'- O-(α -D-甘露
吡喃糖基)核苷。化合物21、28、30和31在体外以10μM的浓度显示出对HeLa细胞和肝癌Bel-7402细胞的生长抑制作用。