1: 89 percent / triethylamine / CH2Cl2 / 0.5 h 2: 1.) NaH / 1.) DMF, 0 deg C, 10 min, 2.) DMF, 65 deg C, 3 h 3: 76 percent / sodium methoxide / methanol / 30 h / 0 °C View Scheme

triethylamine in dichloromethane 0.5 h;