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 dual C-H activation 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
我们报告了一种新型的 Pd 催化的炔烃导向的双 CH 活化双联芳炔,它生产了重要且有用的产品,9,9'-二芴基 (9,9'BF) 衍生物,收率高,具有广泛的功能组兼容性。PdCl2 催化剂与 MnO2 氧化剂和 PivOH 添加剂的组合对于实现目前的催化转化至关重要。机理证据表明,这种分子内芳烃/炔烃环化可能是通过不寻常的双 CH 活化随后与炔烃环化而发生的。