in diethyl ether

potassium hydroxide 1.) ethanol, reflux, 20 min, 2.) reflux, 20 min; Yield given. Multistep reaction;

1: 60 percent / N2H4*H2O / 0.5 h / Heating 2: HCl / ethanol / 2 h / Heating 3: 65 percent / diethyl ether / 0.25 h / Ambient temperature 4: acetic acid / 0.25 h / Heating View Scheme

in diethyl ether 0.25 h; Ambient temperature;