Total Syntheses of Zwitterionic Indole Alkaloids, Flavocarpine and Dihydrovincarpine, by Extended Method for Substituted Pyridine Synthesis through Azaelectrocyclization
作者:Toyoharu Kobayashi、Shigeo Katsumura、Yoshikatsu Hirose、Hiroshi Tsuchikawa
DOI:10.3987/com-14-s(k)46
日期:——
The total syntheses of flavocarpine (1) and dihydrovincarpine (2) have been accomplished through the common intemiediate, 2,4,5-trisubstituted pyridine compound 3 which was prepared by the accelerated 6n-azaelectrocyclization of 4-alkoxycarbonylazatriene 4 followed by aromatization of the resulting dihydropyridine derivative.