AbstractA convenient three‐component coupling reaction for the construction of conjugated enynes using rhodium catalysis is reported. Dimerization of a monosubstituted alkyne followed by trapping of the vinyl metal intermediate with an electron‐deficient alkene, such as methyl vinyl ketone, provided moderate to good yields of these enynes. The use of the hindered electron‐rich tris(ortho‐tolyl)phosphine as a ligand for the rhodium catalyst provided the best conversions to these complex products.magnified image
Ruthenium-Catalyzed Three-Component Coupling via Hydrative Conjugate Addition of Alkynes to Alkenes: One-Pot Synthesis of 1,4-Dicarbonyl Compounds
作者:Yiyun Chen、Sung Hwan Park、Chung Whan Lee、Chulbom Lee
DOI:10.1002/asia.201100266
日期:2011.8.1
A catalytic three‐way rendezvous: Terminal alkynes undergo metal vinylidene formation, anti‐Markovnikov hydration to give a metal acyl complex, and conjugate addition to produce synthetically useful 1,4‐dicarbonyl compounds under ruthenium catalysis. This one‐pot three‐component coupling reaction is a useful platform for further exploration in alkyne functionalization.