1: 1. trimethylsilyl trifluoromethansulfonate 2. diisubutylaluminium hydride / 1.in CDCl3, 20 grad C, 1 h 3: 1. Na 2. triethylamine / 1. in boiling ethanol 2. in methylene chloride, 25 grad C, 1 h 4: 92 percent / sodium dichromate, sulfuric acid / H2O; diethyl ether / 2 h / 25 °C 5: 70 percent / potassium carbonate / butan-2-ol / 5 h / Heating 6: 86 percent / H2 / Pd/C / 10 h / 25 °C / 760 Torr View Scheme