1: 1.) diphenyl ether, 2.) p-toluenesulfonic acid / 1.) reflux, 24 h, 2.) reflux, 18 h 2: 44 percent / diphenyl ether / 10percent Pd/C / 26 h / Heating View Scheme

diphenylether; toluene-4-sulfonic acid 1.) reflux, 24 h, 2.) reflux, 18 h; Yield given. Multistep reaction;