Gold(I)-Catalyzed Cycloisomerizations and Alkoxycyclizations of<i>ortho</i>-(Alkynyl)styrenes
作者:Ana M. Sanjuán、Muhammad A. Rashid、Patricia García-García、Alberto Martínez-Cuezva、Manuel A. Fernández-Rodríguez、Félix Rodríguez、Roberto Sanz
DOI:10.1002/chem.201405789
日期:2015.2.9
Indenes and related polycyclic structures have been efficiently synthesized by gold(I)‐catalyzed cycloisomerizations of appropriate ortho‐(alkynyl)styrenes. Disubstitution at the terminal position of the olefin was demonstrated to be essential to obtain products originating from a formal 5‐endo‐dig cyclization. Interestingly, a complete switch in the selectivity of the cyclization of o‐(alkynyl)‐α‐methylstyrenes