Multi-step reaction with 8 steps 2: KOH / ethanol3: diethyl ether4: 80 percent / KHCO3 / dimethylformamide / 5 h / 20 °C5: 91 percent / triethylamine; 4-(N,N-dimethylamino)pyridine / CH2Cl2 / 5 h / 0 - 20 °C6: sodium azide / dimethylformamide / 12 h / 80 °C7: 0.07 g / H2 / Pd/C / ethyl acetate / 760 Torr8: 94 percent / aq. LiOH / tetrahydrofuran / 1 h / 70 °C  

Multi-step reaction with 10 steps 1: 78 percent / imidazole / dimethylformamide / 24 h2: 51 percent / PPh3; diethyl azodicarboxylate / benzene / 12 h / 20 °C3: 79 percent / DIBALH / CH2Cl2; hexane / 1 h / -20 °C4: 89 percent / triethylamine; 4-(N,N-dimethylamino)pyridine / CH2Cl2 / 5 h / 0 - 20 °C5: 50 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.33 h / 0 °C6: Jones reagent / acetone / 20 °C7: 11 mg / KHCO3 / dimethylformamide / 5 h / 20 °C8: sodium azide / dimethylformamide / 12 h / 80 °C9: 0.07 g / H2 / Pd/C / ethyl acetate / 760 Torr10: 94 percent / aq. LiOH / tetrahydrofuran / 1 h / 70 °C