Treatment of a DMA solution of anilide 1 with a catalytic amount of palladium acetate (0.025 equiv) and XPhos (0.05 equiv) in the presence of potassium carbonate (2.0 equiv) at 100 C afforded dihydroquinolin-2-ones spiro-fused to dihydrofuranyl, indolinyl, and indanyl 2 in good to excellent yields. The reaction went through a domino sequence involving a 5-exo-trig Heck cyclization followed by an intramolecular direct CH functionalization.
Qian Wang, Jieping Zhu, Rémi Julien Sylvain Andres, Fenggang Sun
Qian Wang, Jieping Zhu, Dan Forster, Weisi Guo
Jieping Zhu, Cédric Fung, Qiang Wang, Jia-Chen Xiang