1: 87 percent / 80 h / Ambient temperature 2: 2.) 4 N HCl / 1.) ethyl acetate, 5-18 deg C, 3 h, 2.) ethyl acetate, reflux, 1 h View Scheme

hydrogenchloride 1.) ethyl acetate, 5-18 deg C, 3 h, 2.) ethyl acetate, reflux, 1 h; Multistep reaction;