hydrogenchloride; zinc(II) chloride in diethyl ether 48 h;

sulfuric acid; water; acetic acid 5 h; Heating;

1: 44.7 percent / H2SO4, CH3COOH, H2O / 5 h / Heating 3: NaBH4 4: 76.3 percent / toluene-p-sulphonic acid / benzene / 0.5 h / 45 °C View Scheme

1: 44.7 percent / H2SO4, CH3COOH, H2O / 5 h / Heating 3: NaBH4 4: 76.3 percent / toluene-p-sulphonic acid / benzene / 0.5 h / 45 °C 5: 1.) mercury(II) acetate, 2.) lithium chloride, 3.) palladium dichloride, lithium chloride / 1.) methanol, room temperature, 2 h, 2.) acetone, 15 min 6: 85.6 percent / H2 / 10percent palladium-charcoal / acetone 7: 57.6 percent / sodium methoxide / methanol 8: 71.5 percent / m-chloroperbenzoic acid, toluene-p-sulphonic acid (trace) 9: 39 mg / toluene-p-sulphonic acid View Scheme