名称:
Total Syntheses of Zwitterionic Indole Alkaloids, Flavocarpine and Dihydrovincarpine, by Extended Method for Substituted Pyridine Synthesis through Azaelectrocyclization
摘要:
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.