Ping-Gui Li, Cheng Yan, Shuai Zhu, Shu-Hui Liu and Liang-Hua Zou
Org. Chem. Front., 2018,5, 3464-3468
DOI:
10.1039/C8QO01039K,
Research Article
A highly regioselective C–C bond cleavage/amination of isatins has been developed for the synthesis of benzimidazo[1,2-c]quinazolin-6-ones by reacting with o-phenylene diamines. This practical transition-metal-free method is operationally simple, enabling the C–C bond cleavage and triple C–N bond formation, wherein molecular oxygen is the sole required oxidant.