1: 77 percent / O2; rose bengal, bis(triethylammonium)salt / CH2Cl2 / 6 h / 5 - 10 °C / Irradiation 2: 95 percent / Et3N; PPh3 / CH2Cl2 / 2 h / 20 °C 3: CH2Cl2 / 672000 h / 20 °C View Scheme

1: 77 percent / O2; rose bengal, bis(triethylammonium)salt / CH2Cl2 / 6 h / 5 - 10 °C / Irradiation 2: 95 percent / Et3N; PPh3 / CH2Cl2 / 2 h / 20 °C 3: 100 percent / 20 °C View Scheme

in acetonitrile T=-30°C;

[RuIV(meso-tetrakis(2,6-dichlorophenyl)porphyrin)Cl2]; 2,6-dichloropyridine-N-oxide in chloroform-d1 T=60°C; Wacker Oxidation; 6 h;