tetraethylammonium p-toluenesulfonate Ambient temperaturecarbon rod anode, carbon rod cathode (i.d. 6 mm); constant current: 10 mA; electricity 4.00 F/mol;

1: 85 percent / 0.2M Et4NOTs, 2,6-lutidine / Ambient temperature; electrochemical oxidation with 3.13 F/mol electricity 2: 93 percent / 0.2M Et4NOTs / Ambient temperature; electrochemical oxidation View Scheme