1: H2 / Raney Ni / methanol / 20 °C 2: 85 percent / TsOH*H2O / toluene / Heating View Scheme

1: H2 / Raney Ni / methanol / 20 °C 2: K2CO3 / acetone / 70 °C 3: 75 percent / TsOH*H2O / toluene / Heating 4: 5percent aq. NaOH / methanol / 50 °C 5: DDQ / benzene / 80 °C View Scheme

hydrogen; nickel in methanol T=20°C;