1: Zn-Cu couple / diethyl ether / 8 h / Heating 2: Zn-Cu couple, NH4Cl / methanol / 6 h / Ambient temperature 3: molecular sieves 3A, pyridine / 72 h / Ambient temperature 4: 1.) p-toluenesulfonyl chloride, 2.) H2O / 1.) pyridine, 0 deg C, 15 h, 2.) overnight 5: 94 percent / K2CO3 / methanol / 3 h / Ambient temperature 6: 90 percent / BH3*THF / tetrahydrofuran / 2 h / Heating 7: 91 percent / Jones reagent / acetone / 0.33 h / 0 °C 8: 71 percent / base / acetone View Scheme