1: 73 percent / NaH / benzene; 2-methyl-propan-2-ol / 6 h / Heating 2: 1.) NaH, 2.) NaI / 1.) benzene, DMF, 30 min, 2.) 20 deg C, 2 h 3: trifluoroacetic acid / 3 h View Scheme

trifluoroacetic acid 3 h;

1: 1.) NaH, 2.) NaI / 1.) benzene, DMF, 30 min, 2.) 20 deg C, 2 h 2: trifluoroacetic acid / 3 h View Scheme

in toluene 4 h; Heating; Yield given;