2: 2) Borch reduction 3: SOCl2, NEt3 View Scheme

1: 2) Borch reduction 2: SOCl2, NEt3 View Scheme

hydrogenchloride 7 h; Heating;

1: CH2Cl2 / 7 h / Ambient temperature 2: NaBH4 / ethanol / 1.) 0 deg C, 1 h, 2.) room temperature, 4 h 3: 6M-HCl / 7 h / Heating 4: SOCl2 5: 45 mg / triethylamine / benzene / 20 h / Ambient temperature View Scheme

1: 8.38 g / 6M HCl / 5 h / Heating 2: 90 percent / 0.58 h / 230 °C 4: CH2Cl2 / 7 h / Ambient temperature 5: NaBH4 / ethanol / 1.) 0 deg C, 1 h, 2.) room temperature, 4 h 6: 6M-HCl / 7 h / Heating 7: SOCl2 8: 45 mg / triethylamine / benzene / 20 h / Ambient temperature View Scheme

1: W-4 Raney nickel / benzene / 8 h / Heating 2: 6M-HCl / 7 h / Heating 3: SOCl2 4: 45 mg / triethylamine / benzene / 20 h / Ambient temperature View Scheme

1: SOCl2 2: 45 mg / triethylamine / benzene / 20 h / Ambient temperature View Scheme