1: 72 percent / Et3N / CH2Cl2 / 1.) 0 deg C, 4 h, 2.) 5 deg C, 14 h 2: 36 percent / LiAlH4 / diethyl ether / 14 h / Heating 3: 52 percent / KO-t-Bu / dimethylsulfoxide / 2 h / Ambient temperature 4: AgNO3 / CCl4 / 0.5 h View Scheme