Nickel-Catalyzed Cyciizations of Alkynyl Eisones with Concomitant Stereoselective Tri- or Tetrasabstituted Alkeae Introduction

摘要

The conjugate addition of main-group and transition-metal organometailics to enones under Ni catalysis is an important method for C--C bond formation. Fully characterized silyloxy π-allyl nickel complexes were recently impiicated.by Mackenzie as intermediates in conjugate additions of organostannanes to enals in the presence of silyl chlorides (eq 1).