Table 3.

Scope of Phenols^a

^aStandard conditions: 1 (1.0 equiv., 1.0 mmol), 2 (3.0 equiv., 3.0 mmol), DCB (3.0 mL), DMSO (1.0 mL), CuCl₂ (20 mol%, 0.20 mmol) and terpyridine (10 mol%, 0.10 mmol) at 100 °C for 24 h under an atmosphere of O₂. Yields of isolated material represent the average of 2 runs.

^bDCB (4.0 mL), 140 °C, 30 h.

^cDCB (4.0 mL), 140 °C, 60 h, sealed tube.

^dA trace amount of dimerised phenol was observed as an impurity observed.

^eK₂CO₃ (20 mol%, 0.20 mmol) has been used as an additive.