Synthesis of a Dihydropyranonucleoside Using an Oxidative Glycosylation Reaction Mediated by Hypervalent Iodine
作者:Hiroki Takahata、Yuichi Yoshimura、Hiroya Kan-no、Yukako Saito、Shun Omoto、Sakie Minato、Hideaki Wakamatsu、Yoshihiro Natori、Tomozumi Imamichi
DOI:10.1055/s-0033-1340663
日期:——
after several manipulations and separation of the anomers. As a part of our ongoing studies of structure–activity relationships regarding cyclohexenyl nucleosides, we were prompted to synthesize a dihydropyranonucleoside as a potential anti-HIV agent. The synthesis of a glycal moiety started from but-2-enediol, which was converted into a di-PMB derivative in several steps. The introduction of an allyl
摘要 作为我们正在进行的关于环己烯基核苷的构效关系研究的一部分,我们被提示合成二氢吡喃核苷作为潜在的抗HIV药物。糖基部分的合成从丁-2-烯二醇开始,在几个步骤中将其转化为二-PMB衍生物。引入烯丙基,然后闭环易位,得到二氢吡喃衍生物。在由威尔金森氏催化剂催化的双键异构化后,将所得的2,3-双[(4-甲氧基苄氧基)甲基] -3,4-二氢-2 H-吡喃基糖类进行高价介导的氧化糖基化反应碘。(PhSe)2 / PhI(OAc)2处理2,3-双[(4-甲氧基苄氧基)甲基] -3,4-二氢-2 H-吡喃/ TMSOTf(cat。)提供了所需的吡喃氟嘧啶,为端基异构体的混合物,在对端基异构体进行多次操作和分离后,将其转化为最终目标物二氢吡喃胞苷。 作为我们正在进行的关于环己烯基核苷的构效关系研究的一部分,我们被提示合成二氢吡喃核苷作为潜在的抗HIV药物。糖基部分的合成从丁-2-烯二醇开始,在几个步骤