hydrogenchloride in water 6 h; Reflux;

With  sodium tetrahydroborate in  methanol 5 h;  Cooling with ice;   

Multi-step reaction with 3 steps 1.1: triethylamine / toluene / 24 h / 20 °C2.1: n-butyllithium / tetrahydrofuran; hexane / 1.5 h / -78 °C2.2: -78 - -15 °C3.1: sodium tetrahydroborate / methanol / 5 h / Cooling with ice