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Reaction conditions: 1(0.2 mmol),2a (0.8 mmol), 3 (0.6 mmol), [Cp*Co(C6H6)][B(C6F5)4]2 (20 mol%), Proton Sponge® (20 mol%) in DCE ([1] = 1.0 M) at 70 °C. Isolated yields reported.
Conducted at 50 °C.
1,2-dichlorobenzene as solvent.
PhCl as solvent.
Toluene as solvent.
2a (1.2 mmol, 6.0 equiv.). Piv = pivalate.
