1: silica gel; C26H51N2O2(1+)*BF4(1-) / dichloromethane / 24 h / 20 °C 2: boron trichloride; C6HMe5 / dichloromethane / 0.5 h / -78 °C / |Cooling with acetone-dry ice 3: formic acid; [Ir(phenylpyridine(-1H))2(4,4′-di-tert-butyl-2,2′-bipyridine)](PF6); N-ethyl-N,N-diisopropylamine / acetonitrile / 48 h / 20 °C / |Irradiation View Scheme