Silver-catalyzed 2-isocyanobiaryls insertion/cyclization with phosphine oxides: synthesis of 6-phosphorylated phenanthridines
作者:Jia-Jia Cao、Tong-Hao Zhu、Zheng-Yang Gu、Wen-Juan Hao、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1016/j.tet.2014.07.078
日期:2014.9
silver-catalyzed 2-isocyanobiaryls insertion/cyclization with phosphine oxides was described for the construction of the 6-phosphorylated phenanthridines through radical addition of in situ formed P-centered radical to 2-isocyanobiphenyls and homolytic aromatic substitution process. The reactions could proceed smoothly to give the desired 6-phosphorylated phenanthridines promoted by AgOAc (20 mol %) with PhI(OAc)2