hydrogen; nickel in methanol T=25 - 40°C; P=760 Torr; 8 h;

Multi-step reaction with 2 steps 1: 77 percent / 90percent H2SO4 / toluene / 1 h / 30 °C2: 3 percent / 0.2N NaOH / 2 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 57 percent / 2N NaOH / 1 h / Ambient temperature2: 77 percent / 90percent H2SO4 / toluene / 1 h / 30 °C3: 3 percent / 0.2N NaOH / 2 h / Ambient temperature