1: 85 percent / p-toluenesulfonic acid / toluene / 24 h / Heating 2: potassium hydroxide / H2O / 6 h / Heating View Scheme

1: 85 percent / p-toluenesulfonic acid / toluene / 24 h / Heating 2: potassium hydroxide / H2O / 6 h / Heating 3: H2O; CHCl3 / 2 h / 20 °C 4: LiAlH4 / tetrahydrofuran / 12 h / Heating 5: 6N HCl / H2O / 12 h / Ambient temperature 6: 9 percent / hydroxylamine hydrochloride, sodium acetate / methanol / 8 h / Ambient temperature View Scheme

1: 85 percent / p-toluenesulfonic acid / toluene / 24 h / Heating 2: potassium hydroxide / H2O / 6 h / Heating 3: H2O; CHCl3 / 2 h / 20 °C 4: LiAlH4 / tetrahydrofuran / 12 h / Heating 5: 6N HCl / H2O / 12 h / Ambient temperature 6: 9 percent / hydroxylamine hydrochloride, sodium acetate / methanol / 8 h / Ambient temperature 7: LiAlH4 / tetrahydrofuran; diethyl ether / 3 h / Heating View Scheme

1: 85 percent / p-toluenesulfonic acid / toluene / 24 h / Heating 2: potassium hydroxide / H2O / 6 h / Heating 3: H2O; CHCl3 / 2 h / 20 °C 4: LiAlH4 / tetrahydrofuran / 12 h / Heating 5: 6N HCl / H2O / 12 h / Ambient temperature View Scheme