1: 1.) PhSeCl, 2.) mCPBA / 1.) THF, -78 deg C, 2 h, 2.) 0 deg C, 30 min 2: 42 percent / CeCl3, NaBH4 / methanol / 0.33 h / Ambient temperature 3: 90 percent / sodium bis(2-methoxyethoxy)aluminum hydride / tetrahydrofuran; toluene / 2 h / Heating View Scheme

With  benzeneselenenyl chloride; 3-chloro-benzenecarboperoxoic acid  1.) THF, -78 deg C, 2 h, 2.) 0 deg C, 30 min;  Yield given. Multistep reaction;   

Multi-step reaction with 2 steps 1: 1.) PhSeCl, 2.) mCPBA / 1.) THF, -78 deg C, 2 h, 2.) 0 deg C, 30 min2: 42 percent / CeCl3, NaBH4 / methanol / 0.33 h / Ambient temperature