1: 70 percent / lithium diisopropyl amide / hexane; tetrahydrofuran; hexamethylphosphoric acid triamide / 1.) -78 deg C, 1 hr., 2.) r.t., 2 hrs., 2: 50 percent / acetic acid / 4 h / Heating View Scheme

HOF* CH3CN T=0°C;