1: 80 percent / thiourea / methanol / Ambient temperature 2: HCl / methanol / 45 °C View Scheme

With  polystyrene-bound N-methylthiourea in  dichloromethane T=20°C; 2.5 h;   

Multi-step reaction with 6 steps 1: oxygen; 5,15,10,20-tetraphenylporphyrin / tetrachloromethane / 5.5 h / 0 °C / Sun lamp irradiation2: 5,10,15,20-tetraphenyl-21H,23H-porphine Co(II) / 2.5 h / 25 °C / Inert atmosphere3: dilithium tetrabromocuprate / tetrachloromethane; acetonitrile / 1 h / 25 °C4: toluene-4-sulfonic acid / dichloromethane / 2 h / 0 °C5: tetra-(n-butyl)ammonium iodide; 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 2 h / Reflux6: oxygen; 5,15,10,20-tetraphenylporphyrin / tetrachloromethane / 7.5 h / Sun lamp irradiation