Pd(0)-catalyzed domino C–N coupling/hydroamination/C–H arylation reactions: efficient synthesis and photophysical properties of azaindolo[1,2-f]phenanthridines

A series of new 7- and 4-azaindolo[1,2-f]phenanthridines were synthesized by a domino Pd(0)-catalyzed reaction, which involves three sequential steps: C-N coupling, hydroamination, and intramolecular C-H arylation. The products show promising fluorescence properties with high quantum yields (12-65%).