1: 97 percent / sodium methoxide / methanol / 0.33 h / 0 °C 2: 1.) hexamethyldisilazane, fuming sulfuric acid, 2.) diisobutylaluminum hydride / 1.) reflux, 12 h, 2.) xylene, reflux, 3 d View Scheme

sodium methylate in methanol T=0°C; 0.333333 h;