1: 90 percent / K2CO3, KOH / benzyl triethylammonium chloride / acetonitrile / 14 h / Ambient temperature 2: 1.) hydrochloric acid (1N); 2.) hydrochloric acid (6N) / 1.) ether, 12 h, room temp.; 2.) reflux, 4 h View Scheme

hydrogenchloride 1.) ether, 12 h, room temp.; 2.) reflux, 4 h; Yield given. Multistep reaction;