potassium hydroxide in methanol 1 h; Heating;

1: 88 percent / aq. KOH / methanol / 1 h / Heating 2: 88 percent / anhydrous HF / 15 h / Ambient temperature View Scheme

1: 88 percent / aq. KOH / methanol / 1 h / Heating 2: 88 percent / anhydrous HF / 15 h / Ambient temperature 3: 95 percent / Sodium borohydride / dimethylformamide / 6 h / Ambient temperature 4: 62 percent / p-TsOH / benzene / 0.75 h / Heating View Scheme