1.1: 83 percent / (R)-BINAL-H / tetrahydrofuran / 6 h / -78 °C 2.1: Mg; I2 / tetrahydrofuran / 1.5 h / Heating 2.2: tetrahydrofuran / Heating 3.1: 13.8 g / aq. H2SO4 / tetrahydrofuran / 2 h / 60 °C 4.1: 75 percent / I2; KI; aq. NaOH / dioxane / 2 h / 60 °C 5.1: 85 percent / HCOOH; CH3SO3H / 10 percent Pd/C / 15 h / Heating View Scheme