The first three-component reaction of norbornene with two alkynes leading to 1,5-enyne via C−H bond activation of terminal silylacetylene was achieved using a Ni(cod)2/phosphine catalyst. This reaction is applicable for various internal alkynes and norbornene derivatives with high regio- and stereoselectivities.
Highly Chemoselective Nickel-Catalyzed Three-Component Cross-Trimerization of Three Distinct Alkynes Leading to 1,3-Dien-5-ynes
作者:Kenichi Ogata、Jun Sugasawa、Shin-ichi Fukuzawa
DOI:10.1002/anie.200902099
日期:2009.8.3
Cross‐yned: The first highly chemoselective three‐component cross‐trimerization between a triisopropylsilylacetylene, an ether‐functionalized unsymmetrical internalalkyne, and a symmetrical internalalkyne leading to a 1,3‐dien‐5‐yne was achieved using a [Ni(cod)2]/PPh3 catalyst. This reaction is applicable for various internalalkynes with high regio‐ and stereoselectivities.