1.1: AlCl3, aluminium chloride; 1,1,3,3-tetramethyldisiloxane / dichloromethane / 0 - 5 °C / Inert atmosphere 2.1: hydrogen / platinum on activated charcoal / tetrahydrofuran / 20 °C / 760.05 Torr 3.1: triethylamine / N,N-dimethyl aminopyride / methanol / 24 h 4.1: sodium methylate / methanol / 0.5 h / 20 °C 4.2: 4 h / 80 °C 4.3: 1 h / 50 °C View Scheme