toluene-4-sulfonic acid in benzene 24 h; Heating;

1: 1) NaH, methanol / 1) benzene, 10 min, reflux, 2) 4 h, reflux 2: 63 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 3: 90 percent / p-toluenesulfonic acid / benzene / 24 h / Heating View Scheme

1: 1) NaH, methanol / 1) benzene, 10 min, reflux, 2) 4 h, reflux 2: 63 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 3: 90 percent / p-toluenesulfonic acid / benzene / 24 h / Heating View Scheme

1: 63 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature 2: 90 percent / p-toluenesulfonic acid / benzene / 24 h / Heating View Scheme