1: thionyl chloride / diethyl ether / 0.25 h / Ambient temperature 2: lithium amide / tetrahydrofuran / 72 h / Ambient temperature 3: 10percent aq. HCl / 14 h / Heating 4: NaNO2, 5percent aq. KOH / aq. HCl / 1 h / 40 - 45 °C View Scheme

thionyl chloride in diethyl ether 0.25 h; Ambient temperature; Yield given;

1: thionyl chloride / diethyl ether / 0.25 h / Ambient temperature 2: lithium amide / tetrahydrofuran / 72 h / Ambient temperature 3: 10percent aq. HCl / 14 h / Heating View Scheme