Regioselective Preparation ofN7- andN9-Alkyl Derivatives ofN6-[(Dimethylamino)methylene]adenine Bearing an Active Methylene Group and Their Further Derivatization Leading to α-Branched Acyclic Nucleoside Analogues
作者:Dana Hocková、Miloš Buděšínský、Radek Marek、Jaromír Marek、Antonín Holý
DOI:10.1002/(sici)1099-0690(199910)1999:10<2675::aid-ejoc2675>3.0.co;2-z
日期:1999.10
trifluoroethyl-N6-[(dimethylamino)methylene]adenine (1, 2, 6, 7) were prepared regioselectively, the former by the direct alkylation of N6-[(dimethylamino)methylene]adenine, the latter by the alkylation of adenine followed by protection of the amino group. These derivatives, which bear an active methylene group, were submitted to reactions with allyl bromide, aldehydes or tert-butoxybis(dimethylamino)methane in
氰甲基和三氟乙基-N6-[(二甲氨基)亚甲基]腺嘌呤(1, 2, 6, 7)的N7-和N9-区域异构体被区域选择性地制备,前者通过N6-[(二甲氨基)亚甲基]腺嘌呤的直接烷基化,后者通过腺嘌呤的烷基化,然后是氨基的保护。这些带有活性亚甲基的衍生物与烯丙基溴、醛或叔丁氧基双(二甲氨基)甲烷反应以修饰它们的侧链。通过这种方式,制备了几种新的α-支链无环腺苷类似物(8, 10-16);烷基化的区域选择性和产物结构由 1H-和 13C-NMR 光谱确定。所选化合物的 15N-NMR 参数通过梯度增强反向检测技术进行研究。此外,导数 1 的 X 射线数据,