1: LiAlH4 / tetrahydrofuran / 12 h / Ambient temperature 2: p-toluenesulfonyl chloride, Et3N / CH2Cl2 / 12 h / Ambient temperature 3: 15 percent / Na / tetrahydrofuran; liquid ammonia / 0.75 h / -78 °C / other reagent, solvent, reaction time, temperature; effect of sonication View Scheme