1: 71 percent / t-BuLi, TMEDA / hexane; tetrahydrofuran / 1.) -70 deg C, 15 min; -70 to 0 deg C, 1 h, 2.) -70 deg C, 15 min; -70 to 20 deg C, 75 min 2: 1.) AgNO3, 2.) KCN / 1.) EtOH, H2O, 0-5 deg C, 15 min, 2.) EtOH, H2O, 20 deg C, 2 h View Scheme

potassium cyanide; silver nitrate 1.) EtOH, H2O, 0-5 deg C, 15 min, 2.) EtOH, H2O, 20 deg C, 2 h; Yield given. Multistep reaction. Title compound not separated from byproducts;