sodium hydride in tetrahydrofuran 10 h; Heating;

1: 93 percent / H2 / 10percent Pd/C / ethanol / 24 h / 25 °C / 3102.9 Torr 2: 64 percent / NaH / tetrahydrofuran / 10 h / Heating View Scheme

1: 72 percent HClO4 / H2O / 12 h / 80 °C 2: 1.) Li-tert-butoxid, 2.) LiBr*H2O / 1.) tert-Butanol, reflux, 2.) reflux, ca. 12 d View Scheme

1: BF4*OEt2 / 75 - 80 °C / 15-20 h 2: satd. aq. NaOH / 10 h / Ambient temperature 3: 72 percent HClO4 / H2O / 12 h / 80 °C 4: 1.) Li-tert-butoxid, 2.) LiBr*H2O / 1.) tert-Butanol, reflux, 2.) reflux, ca. 12 d View Scheme

lithium bromide; lithium tert-butylate 1.) tert-Butanol, reflux, 2.) reflux, ca. 12 d; Yield given. Multistep reaction;