1: 59 percent / 1.) BuLi / tetrahydrofuran / 1.) from -78 deg C to room temp.; 2.) from -30 deg C to room temp. 2: 95 percent / diethyl ether / 0.5 h / Irradiation 3: 91 percent / sodium triacetoxyborohydride / acetic acid; tetrahydrofuran / 0.5 h / 0 °C View Scheme