thionyl chloride in chloroform 3 h; Heating;

1: 13 percent / hydroquinone / 24 h / 150 °C 2: sodium ethoxide / ethanol / 72 h / Ambient temperature 3: 87 percent / KOH / ethanol / 4 h / Heating 4: 100 percent / SOCl2 / CHCl3 / 3 h / Heating View Scheme

1: 13 percent / hydroquinone / 24 h / 150 °C 2: sodium ethoxide / ethanol / 72 h / Ambient temperature 3: 87 percent / KOH / ethanol / 4 h / Heating 4: 100 percent / SOCl2 / CHCl3 / 3 h / Heating View Scheme

1: sodium ethoxide / ethanol / 72 h / Ambient temperature 2: 87 percent / KOH / ethanol / 4 h / Heating 3: 100 percent / SOCl2 / CHCl3 / 3 h / Heating View Scheme