1: (COCl)2, DMF / benzene / 3 h / Ambient temperature 2: 1.) Na / 1.) THF, 2.) 10 min 3: 91 percent / Bu3SnH, AIBN / benzene / 2 h / Heating 4: ethyl acetate / 18 h / Ambient temperature 5: dimethyldioxirane / CH2Cl2 / -78 °C 6: Et3N / CH2Cl2 / 18 h / Ambient temperature 7: 1.) Zn, TiCl4 / 1.) THF, r.t., 30 min; CH2Cl2, r.t., 30 min, 2.) 15 min 8: 88 percent / aq. K2CO3 / methanol / 18 h / Heating 9: (COCl)2, DMF / CH2Cl2 / 2 h 10: DMAP / benzene / 0.5 h / Heating 11: benzene / 1 h / Heating; Irradiation View Scheme