1: 88 percent / NaBH4 / 3 h / Ambient temperature 2: 1.) 10percent KOH / 1.) MeOH, H2O, reflux, 30 min; 2.) 180 deg C, 4 h 3: 59 percent / LiAlH4 / tetrahydrofuran / 6 h / Heating 4: 20 percent / hexamethylphosphoric acid triamide / 0.5 h / Heating 5: 80 percent / H2 / 5percent Pd-C / methanol View Scheme