sodium bis(2-methoxyethoxy)aluminium dihydride in tetrahydrofuran; toluene 2 h; Heating;

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