1: 1.2 g / HF / 1.) -76 deg C, 30 min, 2.) 0 deg C, overnight 2: 1.07 g / LAH / diethyl ether / 2 h 3: 60 percent / TsOH / diethyl ether / 0.17 h / Heating 4: 0.005 g / DDQ / benzene / 0.5 h / Heating View Scheme

With  hydrogen fluoride  1.) -76 deg C, 30 min, 2.) 0 deg C, overnight;   

Multi-step reaction with 3 steps 1: 1.2 g / HF / 1.) -76 deg C, 30 min, 2.) 0 deg C, overnight2: 1.07 g / LAH / diethyl ether / 2 h3: 60 percent / TsOH / diethyl ether / 0.17 h / Heating