hydrogen; nickel in methanol P=52504.2 Torr; 4 h;

1: 50 percent / cc H2SO4, HNO3 / 1./ 0.5 h. 2./ 1 h. room temp. 2: 1./ cc H2SO4, NaNO2, acetic acid, 2./ CuBr, NaBr, 16percent HBr / 1./ water, 1 h. 3-5 deg C. 3: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 4: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 37 percent / HNO3 / 0.25 h / 0 - 5 °C 2: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 3: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 1./ cc H2SO4, NaNO2, acetic acid, 2./ CuBr, NaBr, 16percent HBr / 1./ water, 1 h. 3-5 deg C. 2: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 3: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 100 percent / 5n HCl / 1.5 h / Heating 2: 1./ cc H2SO4, NaNO2, acetic acid, 2./ CuBr, NaBr, 16percent HBr / 1./ water, 1 h. 3-5 deg C. 3: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 4: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 2: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 75 percent / HNO3 / acetic acid / 2 h / Ambient temperature 2: 100 percent / 5n HCl / 1.5 h / Heating 3: 1./ cc H2SO4, NaNO2, acetic acid, 2./ CuBr, NaBr, 16percent HBr / 1./ water, 1 h. 3-5 deg C. 4: 38 percent / CuCl, potassium tert-butoxide / 2-methyl-propan-2-ol / 7 h / Heating 5: 100 percent / H2 / Raney-nickel / methanol / 4 h / 52504.2 Torr View Scheme

1: 2.) Cr2O3 / 1.) AcOH, 25 deg C, 30 min; 2.) AcOH, water, 40 deg C, 2 h 2: 84 percent / 10 N HCl / ethanol / 2 h / Heating 3: 48 percent / pyridine / 1.) 0 deg C, 1 h; 2.) 20 deg C, 2 h View Scheme

pyridine 1./ 3 h. 0 deg C. 2./ room temp.;