hydrogenchloride in tetrahydrofuran 10 h; Ambient temperature;

Multi-step reaction with 2 steps 1: di-isopropylamine, BuLi / tetrahydrofuran; hexane / 1.) -78 deg C, 1 h; 2.) room temp. 1 h2: 52 percent / tetrahydrofuran / 1.) -78 deg C, 5 h; 2.) room temp. 10 h