1: 90 percent / NaBH4 / ethanol / 6 h / Ambient temperature 2: NaH / dimethylformamide / 1.) 0 deg C, 1 h; 2.) RT, 1 h; 3.) 0 deg C, 6 h; 4.) RT, 18 h 3: cc. HCl / methanol / Heating View Scheme