Pd-Catalyzed Synthesis of 9,9′-Bifluorenylidene Derivatives via Dual C–H Activation of Bis-biaryl Alkynes
作者:Jian Zhao、Naoki Asao、Yoshinori Yamamoto、Tienan Jin
DOI:10.1021/ja503252k
日期:2014.7.9
We report a novel Pd-catalyzed alkyne-directed dualC-Hactivation of bis-biaryl alkynes, which produced important and useful products, 9,9'-bifluorenylidene (9,9'BF) derivatives, in high yields with a broad range of functional group compatibility. The combination of the PdCl2 catalyst with the MnO2 oxidant and PivOH additive is vital for realization of the present catalytic transformation. Mechanistic