1: CuCl2 / 1.) -78 deg C, 0.5 h; 2.) RT, 0.5 h 2: 1.) LiAlH4; 2.) acetic acid, hydroquinone / 1.) THF, RT, 12 h; 2.) RT, 12 h View Scheme

Multi-step reaction with 2 steps 1: CuCl2 / 1.) -78 deg C, 0.5 h; 2.) RT, 0.5 h2: 35 percent / p-toluenesulfonic acid / toluene / 15 h / Heating