1: 95 percent / H2; 1N aq. HCl / Raney Ni W-2 / H2O / 2.5 h / 26 °C / 760 Torr 2: Amberlite IRA-402 (OH-) / H2O 3: dimethylformamide / 4 h / 24 °C View Scheme

1: 79 percent / NaNO2, 1N aq. HCl / 2 h / 0 - 3 °C 2: 62 percent / H2 / 10percent Pd-C / methanol / 1.33 h / 760 Torr / Ambient temperature View Scheme

1: 95 percent / H2; 1N aq. HCl / Raney Ni W-2 / H2O / 2.5 h / 26 °C / 760 Torr 2: Amberlite IRA-402 (OH-) / H2O 3: dimethylformamide / 4 h / 24 °C 4: 81 percent / m-chloroperbenzoic acid / methanol / 7 h / 30 °C View Scheme

With  hydrogenchloride; hydrogen; Raney Ni W-2 in  water T=26°C; P=760 Torr; 2.5 h;   

Multi-step reaction with 4 steps 1: 16 h / 70 - 75 °C2: 81 percent / m-chloroperbenzoic acid / methanol / 7 h / 30 °C3: N,N-dimethyl-acetamide / 6.5 h / 13 - 14 °C4: Amberlite IRA-402 (HCO3(-1)), NaOH / 0.25 h / Heating