1: 47 percent / methanol / 1 h / 0 °C 2: 86 mg / Jones reagent / acetone / 3 h / 23 °C 3: 57 percent / AIBN, Bu3SnH / toluene / 1 h / Heating 4: 100 percent / KOH / H2O; methanol / 3 h / Heating View Scheme