1: 57.9 percent / tetrahydrofuran / -78 °C 2: N-bromosuccinimide (NBS) / tetrahydrofuran; H2O 3: pyridinium chlorochromate (PCC), CH3COONa / CH2Cl2 4: 97.1 percent / NaBH4, CeCl3*7H2O / methanol; CH2Cl2 5: 94.2 percent / pyridinium toluene-p-sulphonate (PPTS) / CH2Cl2 6: 84.6 percent / diethyl ether / 1 h / -10 °C 7: lithium aluminium hydride / diethyl ether 8: triethylamine / CH2Cl2 9: lithium aluminium hydride / diethyl ether 10: 93.5 percent / 10percent HCl / tetrahydrofuran View Scheme