1: 1.) NaH / 1.) DMF, 2.) 90 deg C, 4 h 2: 95 percent / HCl / 0.5 h / Heating View Scheme

1: 64 percent / K2CO3 / dimethylformamide / 16 h / Ambient temperature 2: 52 percent / tri-n-butyltin hydride, azobisisobutyronitrile / benzene / 9 h / Heating View Scheme

1: 1.) NaH / 1.) DMF, 2.) 90 deg C, 4 h 2: 95 percent / HCl / 0.5 h / Heating 3: 1.) NaH / 1.) DMF, RT, 2.) 85 deg C, 5 h View Scheme