1: 96 percent / Red-Al / tetrahydrofuran / 1 h / 0 °C 2: 98 percent / imidazole / dimethylformamide / 44 h / 60 °C 3: 80 percent / H2 / Pd/C / ethanol / 48 h / 20 °C 4: 97 percent / 1 h / -78 - 0 °C 5: 82 percent / diethyl ether / 0.5 h / 0 °C 6: 80 percent / CrO3; H2SO4 / acetic acid / 2 h View Scheme

With  titanium(IV) isopropylate; tert.-butylhydroperoxide; (-)-diethyl tartrate in  dichloromethane T=-40 - 20°C; Sharpless asymmetric epoxidation;