1: 83 percent / 35 percent aq. H2O2, AcOH / 6 h / 100 °C 2: thionyl chloride / 2 h / 60 °C 3: 0.75 h / 60 °C View Scheme

1: 99 percent / aq. NaOH / 1 h / Ambient temperature 2: 83 percent / 35 percent aq. H2O2, AcOH / 6 h / 100 °C 3: thionyl chloride / 2 h / 60 °C 4: 0.75 h / 60 °C View Scheme

T=60°C; 0.75 h; Yield given;