Reaction of zirconocene dichloride with alkyllithiums or alkyl grignard reagents as a convenient method for generating a “zirconocene” equivalant and its use in zirconium-promoted cyclization of alkenes, alkynes, dienes, enynes, and diynes
Metal-promoted cyclization. 19. Novel bicyclization of enynes and diynes promoted by zirconocene derivatives and conversion of zirconabicycles into bicyclic enones via carbonylation
作者:Eiichi Negishi、Steven J. Holmes、James M. Tour、Joseph A. Miller、Fredrik E. Cederbaum、Douglas R. Swanson、Tamotsu Takahashi