First total syntheses of dihydroflustramine C and flustramine E, alkaloids from the marine bryozoan Flustra foliacea
作者:Martha S Morales-Rı́os、Oscar R Suárez-Castillo、Pedro Joseph-Nathan
DOI:10.1016/s0040-4020(02)00011-x
日期:2002.2
tricyclic skeleton of physostigmine type alkaloids, and demonstrated its utility for indole alkaloid synthesis. Thus, we achieved the first totalsyntheses of (±)-dihydroflustramine C and (±)-flustramine E, as well as the totalsyntheses of their debromoanalogues from the corresponding 2-hydroxyindolenines in five steps with 31, 27, 39 and 23% overall yields, respectively. The structures of some intermediates