1: 1.) MeLi / 1.) Et2O, DME, 0 deg C, 5 min, 2.) 30 s 2: ethyl acetate / 18 h / Ambient temperature 3: dimethyldioxirane / CH2Cl2 / -78 °C 4: Et3N / CH2Cl2 / 18 h / Ambient temperature 5: 1.) Zn, TiCl4 / 1.) THF, r.t., 30 min; CH2Cl2, r.t., 30 min, 2.) 15 min 6: 88 percent / aq. K2CO3 / methanol / 18 h / Heating 7: (COCl)2, DMF / CH2Cl2 / 2 h 8: DMAP / benzene / 0.5 h / Heating 9: benzene / 1 h / Heating; Irradiation View Scheme