A directed metalation route to the zwitterionic indole alkaloids. Syntheses of indolo[2,3-a]quinolizine, flavopereirine, flavocarpine, and dihydroflavopereirine
Total Syntheses of Zwitterionic Indole Alkaloids, Flavocarpine and Dihydrovincarpine, by Extended Method for Substituted Pyridine Synthesis through Azaelectrocyclization
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.
GRIBBLE, GORDON W.;JOHNSON, DAVID A., TETRAHEDRON LETT., 28,(1987) N 44, 5259-5262
作者:GRIBBLE, GORDON W.、JOHNSON, DAVID A.
DOI:——
日期:——
A directed metalation route to the zwitterionic indole alkaloids. Syntheses of indolo[2,3-a]quinolizine, flavopereirine, flavocarpine, and dihydroflavopereirine