1.1: 1.52 g / hydrochloric acid / H2O / 0.5 h / Heating 2.1: 73.5 percent / sodium acetate; molecular sieves 4 Angstroem; pyridinium chlorochromate / CH2Cl2 / 2.33 h / 0 - 20 °C 3.1: magnesium / tetrahydrofuran 3.2: 73 percent / tetrahydrofuran / 1 h / 0 - 20 °C View Scheme