1: 53 percent / pyridine / 8 h / Ambient temperature 2: 86 percent / hydrogen, acetic acid / palladium-carbon / ethanol / 2 h / Ambient temperature 3: 1.) molecular sieves 4A, 2.) trimethylsilyl triflate / 1.) CH2Cl2, room temperature, 30 min, 2.) CH2Cl2, room temperature, 45 min 4: 84 percent / sodium methoxide / methanol / 48 h / Heating View Scheme