1: 88 percent / (COCl)2, DMSO, Et3N / CH2Cl2 2: Ph3P, DEAD / dimethylformamide 4: 99 percent / RuO4 / CH2Cl2; CCl4 5: NaH / 1,2-dimethoxy-ethane 6: 1.) p-TSOH, AC2O, 2.) K2CO3 / 2.) benzene 7: 80 percent / pyridine / 38 °C 8: 1.) CH3CH=C(CH3)2, NaOCl2-NaH2PO4, 2.) (i-Pr)2NEt / 1.) t-BuOH, H2O; 2.) CH2Cl2 9: 75 percent / NaBH4 / tetrahydrofuran; various solvent(s) View Scheme