Table 9. Carbonylative Sonogashira Coupling Reactions of Iodobenzene (1a–d) with Alkyl Alkynes (4a–h) Catalyzed by Pd-C3^a.

^aReaction conditions: Pd-C3 (0.20 mol %), aryl iodide (1.0 mmol), alkyne (1.5 mmol), Et₃N (2.0 mmol), toluene (3 mL), CO (200 psi), 100 °C, 18 h.

^bIsolated yield.

^cTime = 6 h.