1: 1.) Et3Al, 2.) 5percent KOH-MeOH, 3.) 2M HCl 2: 56 percent / toluene-p-sulphonic acid / 17 h / Ambient temperature 3: 65 percent / di-isobitylaluminium hydride / tetrahydrofuran; hexane / 5 h / Ambient temperature 4: 580 mg / pyridine / 16 h / Ambient temperature 5: NaBH4 / methanol; tetrahydrofuran / 3 h / Ambient temperature 6: 260 mg / pyridine / 3 h / Ambient temperature 7: 96 percent / NaI / acetone / 72 h / Heating 8: 98 percent / Bu3SnH / tetrahydrofuran / 18 h / Ambient temperature 9: 396 mg / 5percent KOH-MeOH / tetrahydrofuran / 1 h / Ambient temperature 10: pyridine / 2 h / Ambient temperature 11: 1.) BF3-THF complex, 2.) 2N NaOH, 30percent H2O2, 3.) pyridinium chloroformate 12: 209 mg / LiBr / dimethylformamide / 1 h / Heating 13: 220 mg / OsO4, N-methylmorpholine N-oxide / 2-methyl-propan-2-ol; tetrahydrofuran; H2O / 3 h 14: 70percent AcOH / H2O / 4 h / 65 °C View Scheme