1: With sodium tetrahydroborate in ethanol T=0°C; 0.166667 h; 2: With bromine in methanol; water

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