Asymmetric synthesis of (+)-lentiginosine using a chiral aziridine based approach
作者:Hojong Yoon、Kyung Seon Cho、Taebo Sim
DOI:10.1016/j.tetasy.2014.02.009
日期:2014.4
The synthesis of the indolizidine alkaloid, (+)-lentiginosine, is described. A key feature of the preparative route is the efficient and stereoselective construction of a dihydroxylated pyrrolidine via Sharpless asymmetric dihydroxylation of an aziridine-enoate, which was prepared from commercially available 1-(S)-α-methylbenzylaziridine-2-methanol. In addition, a regioselective aziridine-to-pyrrolidinone
的吲哚里生物碱的合成中,(+) - lentiginosine,进行说明。的制备路线的一个关键特点是,通过氮丙啶烯酸酯,将其从可商购的1-(制备的Sharpless不对称二羟基化一个二羟基吡咯烷的高效和立体结构小号)-α-methylbenzylaziridine -2-甲醇。另外,采用区域选择性的氮丙啶-吡咯烷酮环扩环过程,然后进行维蒂希(Wittig)烯化反应,以构建后期吡咯烷中间体,该中间体被转化为(+)-龙胆草碱。