potassium carbonate in acetone 15 h; Heating;

1: 85 percent / sulfuric acid / benzene / 40 h / Heating 2: 84 percent / K2CO3 / acetone / 15 h / Heating View Scheme

sodium ethanolate in toluene 18 h; Heating;

1: 91 percent / C2H5ONa / toluene / 18 h / Heating 2: HCl / H2O / 3 h / Heating 3: NaBH4 / methanol / 0.5 h / Ambient temperature 4: 94 percent / H3PO4 (85percent) / 15 h / 170 - 180 °C View Scheme