1: 1.) boron trifluoride etherate, NaBH4 / tetrahydrofuran / 1 h / Heating 2: 74 percent / triphenylphosphine, CCl4 / 6.5 h / 90 °C 3: 63 percent / HCl / propan-2-ol / 6.5 h View Scheme

With  sodium tetrahydroborate; boron trifluoride diethyl etherate in  tetrahydrofuran 1 h;  Heating;  Yield given;   

Multi-step reaction with 2 steps 1: 1.) boron trifluoride etherate, NaBH4 / tetrahydrofuran / 1 h / Heating2: 74 percent / triphenylphosphine, CCl4 / 6.5 h / 90 °C