Ligand Effects on Decarboxylative β-keto Acid and Alkyne Coupling.a
aReaction conditions: 0.1 mmol 1a, 0.1 mmol 2a, 5 mol% [Rh(cod)Cl]2, 10 mol% ligand, 0.2 mL THF (0.5 M), 60 °C, 24 hours. bSee ref 23. cDetermined by GC-FID analysis using mesitylene as internal standard. dUsing 0.2 mmol 1a, 4 mol% [Rh(cod)Cl]2, 8 mol% DPEphos, and 2-MeTHF instead.