1: 76 percent / NaH / dimethylformamide 2: 1.) 6percent Na/Hg, Na2HPO4, 2.) p-toluenesulfonic acid / 1.) methanol, room temp., 30 min, 2.) ethanol, reflux, 20 h View Scheme

disodium hydrogenphosphate; sodium amalgam; toluene-4-sulfonic acid 1.) methanol, room temp., 30 min, 2.) ethanol, reflux, 20 h; Yield given. Multistep reaction. Yields of byproduct given;