Multi-step reaction with 3 steps 1: 50 percent / benzene / 30 h / Irradiation2: 1.) NaH / 1.) benzene, DMF, RT, 2.) benzene, 0 deg C3: 22 percent / benzene / 30 h / Irradiation; var. solv.: MeOH, add of iodine  

Multi-step reaction with 3 steps 1: 38 percent / iodine / methanol / 12 h / Irradiation2: 1.) NaH / 1.) benzene, DMF, RT, 2.) benzene, 0 deg C3: 22 percent / benzene / 30 h / Irradiation; var. solv.: MeOH, add of iodine