sodium hydroxide in ethanol; water 3.5 h; Heating;

Multi-step reaction with 3 steps 1: 1.) conc. hydrochloric acid, sodium nitrite, 2.) stannous chloride, hydrochloric acid / 1.) 5-10 deg C, 1 h, 2.) room temperature, 45 min2: 96 percent / ethyldiisopropylamine / tetrahydrofuran / 1.25 h / 5 °C3: 1.) ethyl acetate, 0.5 h, 2). 1 h