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Short Paper | Regular issue | Vol 89, No. 9, 2014, pp.2151-2160
Published online, 30th July, 2014
DOI: 10.3987/COM-14-13051
Synthesis of Heterocycles via Palladium-Catalyzed C-H Activation/Cyclization of Diazonium Salts (Part III): Phenanthridin-6-(5H)-ones

Pan Han, Jing Zhou, Cong-Cong Zhang, Ke Chen, and Zhen-Ting Du*

*College of Science, Northwest A&F University, Yangling 712100, Shaanxi Province, China

Abstract

A series of phenanthridin-6-(5H)-ones were synthesized through a palladium-catalyzed C-H activation/cyclization strategy using diazonium salts in good yields. The best conditions included Pd(OAc)2 as the catalyst, PPh3 as the ligand, toluene as the solvent, K2CO3 as the base and 60 oC as the optimal temperature.