1: 60 percent / HCl / 2 h / Heating 2: 70 percent / p-TsOH / benzene / 15 h / Heating 3: 92 percent / LiAlH4 / diethyl ether / 5 h / Ambient temperature 4: 81 percent / Ph3P*Br2, Et3N / CH2Cl2 / 7 h 5: 1.) lithium amide / 1.) HMPTA, 15 deg C, 1.5 h, 2.) HMPTA, a) 0-10 deg C, 1 h, b) 20-25 deg C, 12 h 6: 91 percent / aq. HCl / acetone / 1 h / Heating 7: 95 percent / H2, NaBH4, Ni(CH3COO)2*4H2O, NH2(CH2)2NH2 / ethanol View Scheme

1: HCl / Heating 2: LiAlH4 / diethyl ether View Scheme

1: 60 percent / HCl / 2 h / Heating 2: 70 percent / p-TsOH / benzene / 15 h / Heating 3: 92 percent / LiAlH4 / diethyl ether / 5 h / Ambient temperature 4: 81 percent / Ph3P*Br2, Et3N / CH2Cl2 / 7 h 5: 1.) lithium amide / 1.) HMPTA, 15 deg C, 1.5 h, 2.) HMPTA, a) 0-10 deg C, 1 h, b) 20-25 deg C, 12 h 6: 91 percent / aq. HCl / acetone / 1 h / Heating View Scheme