Scheme 1. Control Experiments for Palladaelectro Cross-Dehydrogenative Arylation.
General reaction conditions: divided cell, anodic chamber: 1a (0.20 mmol), 2a (1.0 mmol), Pd(OAc)2 (10 mol %), 2.6-lutidine (20 mol %), Cu(OTf)2 (10 mol %), nBu4NBF4 (40 mg), HFIP/AcOH (1.0 mL: 2.0 mL), cathodic chamber: 2a (1.0 mmol), nBu4NBF4 (40 mg), HFIP/AcOH (1.0 mL: 2.0 mL), 100 °C, electrolysis (CCE) at 1.0 mA, 18 h, graphite felt (GF) anode (10 mm × 15 mm × 2 mm), Pt plate cathode (10 mm × 15 mm × 0.25 mm), NMR yields using CH2Br2 as an internal standard.
Isolated yield.
80 °C.
Without Cu(OTf)2.