Free-Radical Approaches to Stemoamide and Analogues
作者:Nicolas Bogliotti、Peter I. Dalko、Janine Cossy
DOI:10.1021/jo061628g
日期:2006.12.1
Two approaches allowing access to the tricyclic stemona backbone are presented. Both approaches rely on a free-radical cyclization reaction as the key step. In the formal synthesis of (±)-stemoamide, the construction of the A ring of the natural product was achieved via a 5-exo-trig radical cyclization with atom transfer. The two diastereoisomers issuing from this cyclization showed different reactivity