1.1: s-BuLi; TMEDA / cyclohexane; diethyl ether / 0.5 h / -78 °C 1.2: 77 percent / AcOH / diethyl ether 2.1: 6 M HCl / 16 h / Heating 2.2: Dowex 50W,H+ View Scheme

hydrogenchloride in benzene 12 h; Ambient temperature;

in ethanol Hydrolysis; 6 h; Heating;