Comparison of precatalyst 3c with several other palladium sources. Conditions: p-tolylzinc chloride (0.65 mmol), 2-bromoanisole (0.5 mmol), Pd (0.1%, Pd:L = 1:1), L = L3, THF, 75 °C, 20 min; yields were determined by GC analysis of the crude reaction mixture.