oxygen; 5,15,10,20-tetraphenylporphyrin in tetrachloromethane T=10°C; Irradiation;

oxygen; 5,15,10,20-tetraphenylporphyrin 1.) CCl4, 10 deg C, irradiation, 2.) 70 deg C, 1 h; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given;