Asymmetric Total Syntheses of Two Phlegmarine-Type Alkaloids, Lycoposerramines-V and -W, Newly Isolated from <i>Lycopodium serratum</i>
作者:Takahide Shigeyama、Kazuaki Katakawa、Noriyuki Kogure、Mariko Kitajima、Hiromitsu Takayama
DOI:10.1021/ol701871v
日期:2007.9.1
Two new Phlegmarine-type alkaloids, lycoposerramines-V and -W, were isolated from Lycopodium, serratum, and their structures including the absolute configuration were established by asymmetric total synthesis involving such key steps as Johnson-Claisen rearrangement, asymmetric allylation, and ring-closing metathesis (RCM)- or Sml(2)-mediated stereoselective piperidine ring construction.