Fig. 3: Scope for the synthesis of 1,2-diaxes of axially chiral arylpyrrolesa.

1 (0.1 mmol), 2 (2.0 equiv., 0.2 mmol), Cu(CH3CN)4BF4 (10 mol%), L5 (12 mol%), MeOH (0.1 M), 0 °C.
1 (0.1 mmol), 2 (2.0 equiv., 0.2 mmol), Cu(CH3CN)4BF4 (10 mol%), L5 (12 mol%), MeOH (0.1 M), 0 °C.