Fig. 3

Rhodium-catalysed direct hydroarylation of alkynes with phosphines. Reaction conditions: 2.5 mol% [Rh(cod)Cl]₂, 1 (0.20 mmol), 4 (0.40 mmol) in 0.5 mL toluene, at 120 °C, 12 h, under argon. All reported yields are isolated yields. ^aUsing 1 (0.20 mmol), 4 (0.60 mmol)