1.1: toluene; tetrahydrofuran / 12 h / Heating 1.2: 72 percent / Pd(PPh3)4 / toluene; tetrahydrofuran / 24 h / Heating 2.1: 96 percent / Dess-Martine periodinane / CH2Cl2 / 14 h / 22 °C 3.1: t-BuOK / tetrahydrofuran / 2 h / Heating 3.2: 81 percent / tetrahydrofuran / 12 h / 22 °C 4.1: 85 percent / H2 / Pd/C / ethyl acetate / 2 h / atmospheric pressure View Scheme