1: FeCl3*6H2O / 1,2-dichloro-ethane / 1 h / Heating 2: NH2OH*HCl, NaOH / ethanol; H2O / 0.33 h / Heating 3: Raney Ni alloy, 2 N aq. NaOH / ethanol / 1 h / Ambient temperature 4: 1.) oxygen, tetraphenylporphine, 2.) triphenylphosphine / 1.) CH2Cl2, -70 deg C, irradiation, 2 h, 2.) -70 deg C, 10 min View Scheme

1: NH2OH*HCl, NaOH / ethanol; H2O / 0.33 h / Heating 2: Raney Ni alloy, 2 N aq. NaOH / ethanol / 1 h / Ambient temperature 3: 1.) oxygen, tetraphenylporphine, 2.) triphenylphosphine / 1.) CH2Cl2, -70 deg C, irradiation, 2 h, 2.) -70 deg C, 10 min View Scheme

1: Raney Ni alloy, 2 N aq. NaOH / ethanol / 1 h / Ambient temperature 2: 1.) oxygen, tetraphenylporphine, 2.) triphenylphosphine / 1.) CH2Cl2, -70 deg C, irradiation, 2 h, 2.) -70 deg C, 10 min View Scheme

oxygen; 5,15,10,20-tetraphenylporphyrin; triphenylphosphine 1.) CH2Cl2, -70 deg C, irradiation, 2 h, 2.) -70 deg C, 10 min; Yield given. Multistep reaction;