introduction of versatile functional groups, allyl and ester, at the C-1 position of the acyclic chain in acyclic adenine nucleosides was achieved for the first time directly by alkylation of adenine and N6-protected adenine. Thus, the C-1′-substituted N9-adenine acyclic nucleoside, adenine-9-yl-pent-4-enoic acid ethyl ester (11), was prepared by direct alkylation of adenine with 2-bromopent-4-enoic
首次通过
腺嘌呤和N6-保护的
腺嘌呤的烷基化首次实现了在无环
腺嘌呤核苷的无环链的C-1位置上引入通用的官能团(烯丙基和酯)。因此,通过将
腺嘌呤与2-
溴戊-4-烯酸
乙酯直接烷基化来制备C-1'-取代的N9-
腺嘌呤无环核苷,
腺嘌呤-9-基-戊-4-烯酸
乙酯(11)。酯(6),而相应的N7-区域异构体,即2- [6,(二甲基
氨基亚甲基
氨基)-
嘌呤-7-基]-戊-4-烯酸
乙酯(10),是通过与N偶联而一步获得的,N-二甲基-N′-(9H-
嘌呤-6-基)-甲am(9)与2-
溴戊-4-烯酸
乙酯(6)。将酯基和烯丙基官能团转化为所需的羟甲基和羟乙基,