Asymmetric Synthesis of (−)-Indolizidines 167B and 209D Based on Stereocontrolled Allylation of a Chiral Tricyclic <i>N</i>-Acyl-<i>N,O-</i>acetal
作者:Naoki Yamazaki、Toshimasa Ito、Chihiro Kibayashi
DOI:10.1021/ol990389z
日期:2000.2.1
chiral (5S)-allylpyrrolidinone with retention of configuration in high yield and diastereoselectivity. On the bases of this methodology, the asymmetric syntheses of the dendrobatid alkaloids (-)-indolizidines 167B and 209D were achieved.
[反应:见正文]掺入(S)-2-(1-氨基乙基)苯酚作为手性助剂的三环N-酰基-N,O-缩醛经过TiCl4介导的烯丙基化,得到保留的手性(5S)-烯丙基吡咯烷酮高产率和非对映选择性的构型。在这种方法的基础上,实现了树状蝙蝠生物碱(-)-吲哚并立核苷167B和209D的不对称合成。