Synthesis of Dihydrophenanthridines by Palladium-Catalyzed[2+2+2] Cyclization Reactions
Wu Yuqin, Yu Liangyun, Zhang Qi, Li Lidong
Chin. J. Org. Chem. . 2017, (9): 2336 -2342 .  DOI: 10.6023/cjoc201703004