Naphthalenes, Isoquinolines, and a Benzazocine from Zirconocene−Copper-Mediated Coupling of Benzocyclobutadiene with Nitriles and Alkynes
作者:T. V. V. Ramakrishna、Paul R. Sharp
DOI:10.1021/ol034040u
日期:2003.3.1
Commercially available 1-bromobenzocyclobutene is a potentially useful synthon particularly with the application of organometallic methodology. Here we show that it is readily converted into Cp(2)Zr(benzocyclobutadiene), which couples with alkynes or nitriles giving five-membered zirconacycles. Treatment of these alkyne- or nitrile-derived zirconacycles with CuCl yields substituted naphthalenes, isoquinolines