Total Syntheses of (−)-Papuamine and (−)-Haliclonadiamine
作者:Todd S. McDermott、Andrew A. Mortlock、Clayton H. Heathcock
DOI:10.1021/jo951647i
日期:1996.1.1
The pentacyclic marine alkaloids (-)-papuamine (1) and (-)-haliclonadiamine (2) have been prepared by total synthesis. The synthesis began with (-)-8, which was converted into diester 20 by way of bis-mesylate 17, dinitrile 18, and diacid 19. Dieckmann cyclization of 20 provided keto ester 21, which was transformed into acetal 22. After hydrolysis of the acetal, ketone 25 was subjected to reductive