1: TiCl3 / 1,2-dimethoxy-ethane 2: 1.) NaBH4; 2.) 9percent HCl / 2.) reflux 3: CrO3/H2SO4 / acetone 4: diisobutylaluminum hydride (DIBAH) / diethyl ether 5: p-TsOH / Heating 6: 1.) AcOH; 2.) NaOH / 1.) reflux; 2.) MeOH 7: 53 percent / CrO3/pyridine 8: LiAlH4 / diethyl ether 9: CrO3/pyridine View Scheme