1: 1.) Et3N, 2.) Al(Hg), 3.) 12N HCl, FeCl3 2: 1.) 1,1'-carbonyldiimidazole / 1.) DMF, 20 deg C, 2.) DMF, 0 deg C, 5 min View Scheme

1,1'-carbonyldiimidazole 1.) DMF, 20 deg C, 2.) DMF, 0 deg C, 5 min; Yield given. Multistep reaction;