1.1: methanol; samarium diiodide / tetrahydrofuran / 4 h / 20 °C / Inert atmosphere 2.1: sodium hydride / tetrahydrofuran; mineral oil / 0.5 h / 0 - 20 °C / Inert atmosphere 2.2: 10 h / 20 °C / Inert atmosphere 3.1: Grubbs' catalyst / toluene / 14 h / 50 °C / Inert atmosphere 4.1: palladium 10 on activated carbon; hydrogen / ethyl acetate / 20 h / 20 °C / 3750.38 Torr View Scheme