Development of Enantioselective Synthetic Routes to the Hasubanan and Acutumine Alkaloids
作者:Nicholas A. Calandra、Sandra M. King、Seth B. Herzon
DOI:10.1021/jo401889b
日期:2013.10.18
reduction–aza-Wittig sequence. The latter serves as a universal precursor to the targets. Key carbon–carbon bond constructions include highly diastereoselective acetylide additions to the N-methyliminium ion derived from 39 and Friedel–Crafts and Hosomi–Sakurai cyclizations to construct the carbocyclic skeleton of the targets. Initially, this strategy was applied to the syntheses of (−)-acutumine (4), (−)-dechloroacutumine