hydrogenchloride in tetrahydrofuran; diethyl ether 2 h; Ambient temperature;

1: 69 percent / aq. H2SO4 / CHCl3 / 72 h / Ambient temperature 2: 43 percent / HCl / diethyl ether; tetrahydrofuran / 2 h / Ambient temperature View Scheme

sodium hydroxide 1 h; Ambient temperature;