1.1: ammonium acetate / 20 - 100 °C 2.1: sodium tetrahydroborate; potassium hydroxide / tetrahydrofuran; water / -10 - 20 °C 3.1: trichlorophosphate / 0 - 50 °C 3.2: |Cooling with ice 4.1: hydroxylamine hydrochloride; pyridine / tetrahydrofuran / 2 h / 50 °C 4.2: 2 h / 80 °C 5.1: platinum on carbon; hydrogen / ethyl acetate / 25 - 30 °C / 6000.6 - 7500.75 Torr / |Autoclave 6.1: acetone; water / 25 - 65 °C / |Resolution of racemate View Scheme