Rh(<scp>iii</scp>)-catalyzed synthesis of tetracyclic isoquinolinium salts <i>via</i> C–H activation and [4+2] annulation of 1-phenyl-3,4-dihydroisoquinolines and alkynes in ethanol
作者:Xinxin Dang、Yu He、Yingtian Liu、Xuehong Chen、Jun-Long Li、Xian-Li Zhou、Hezhong Jiang、Jiahong Li
DOI:10.1039/c8ra05443f
日期:——
An efficient and convenient method to construct tetracyclic isoquinolinium salts via [Cp*RhCl2]2 catalyzed C–H activation and [4 + 2] annulationreactions in ethanol is described. This reaction is very fast and highly efficient in the green solvent ethanol. The reaction works with a broad substrate scope affording the products in good to excellent yields in a short time. Moreover, a ratio of S/C up