1: 1.) sodium nitrite, glacial acetic acid, conc. H2SO4, 2.) Cu / 1.) from 0 deg C to 5 deg C, 30 min, 2.) from 0 deg C to RT, 30 min 2: 92 percent / NaOH / ethanol / 1 h / Heating View Scheme

1: 1.) sodium nitrite, glacial acetic acid, conc. H2SO4, 2.) Cu / 1.) from 0 deg C to 5 deg C, 30 min, 2.) from 0 deg C to RT, 30 min 2: 92 percent / NaOH / ethanol / 1 h / Heating 3: Heating View Scheme

sulfuric acid; copper; acetic acid; sodium nitrite 1.) from 0 deg C to 5 deg C, 30 min, 2.) from 0 deg C to RT, 30 min; Yield given. Multistep reaction;