-allyl-3,4- O -isopropylidene- α- d -galactopyranoside, and methyl 3,4,6-tri- O -methyl-β- d -galactopyranoside were prepared. Reactions of the manno derivatives with azide in toluene solution gave a moderate yield of the gluco azides 3 and 6 , probably because of the prevalence of trans -elimination. A normal substitution product was obtained with one of the galacto derivatives, namely benzyl 6- O -allyl-2-azido-2-deoxy-3
摘要
乳糖衍
生物3-甲基-O-苄基-4,6-O-亚苄基-α-d-甘露
吡喃糖苷的N-
咪唑基磺酰基衍
生物,甲基3,4,6-三-O-苄基-α-d-
甘露糖吡喃糖苷的
乳糖衍
生物除OH-2',苄基6-O-烯丙基-3,4-O-异亚丙基-α-d-
吡喃半
乳糖苷和甲基3,4,6-三-O-甲基-β-d-
吡喃半
乳糖苷外,其他地方均受10个保护准备好了。
甘露糖衍
生物与
叠氮化物在
甲苯溶液中的反应产生适量的
葡糖叠氮化物3和6,这可能是由于反式消除的普遍性所致。用一种半
乳糖衍
生物,即苄基2-乙酰
氨基的前体,苄基6-O-烯丙基-2-
叠氮基-2-脱氧-3,4-O-异亚丙基-α-d-塔洛
吡喃糖苷获得了正常的取代产物。 -2-脱氧-α-d-塔洛
吡喃糖苷。但是,主要反应始终是C-1取代的环收缩,导致差向异构体对12、13;14、15; 26,27; 和32,33。