1: 1.) 2.5 N BuLi / 1.) THF, hexane, -78 deg C, 15 min, 2.) THF, hexane, -78 deg C, 1 h 2: 1.) 1 N lithium hexamethyldisilazane / 1.) THF, 30 min, 2.) THF, 0 deg C, 1 h 3: 99 percent / lithium peroxide, 30percent H2O2, lithium hydroxide monohydrate / tetrahydrofuran; H2O / 1 h 4: triethylamine, diphenyl phosphorazidate / toluene / 0.5 h / 80 °C 5: 92 percent / 3 h 6: 100 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr View Scheme