1: PPh3; DIAD / tetrahydrofuran 2: 95 percent / OsO4; NMO / tetrahydrofuran; H2O 3: NH4OH / methanol 4: 64 percent / Huenig base / CH2Cl2 5: 85 percent / H2 / Pd/C / ethyl acetate 6: 81 percent / I2; PPh3; imidazole / tetrahydrofuran 7: 96 percent / Zn / acetic acid; methanol / 20 °C 8: 62 percent / LDA / tetrahydrofuran / -78 - 20 °C 9: H2; quinoline / Pd/BaSO4 / ethyl acetate 10: Grubbs' catalyst / benzene / Heating 11: 100 percent / satd. HCl / methanol View Scheme