1: 95 percent / Zn-powder, I2 / tetrahydrofuran 2: 95 percent / NaBH4, CaCl2 / tetrahydrofuran / 48 h 3: pyridine / CH2Cl2 / Ambient temperature 4: N-ethyldiisopropylamine / CH2Cl2 / 40 °C 5: 89 percent / NaN3 / dimethylformamide / 90 °C 6: 87 percent / tetrabutylammonium fluoride trihydrate / tetrahydrofuran / Ambient temperature 7: pyridine / CH2Cl2 / -20 °C 8: 95 percent / H2 / 10percent Pd-C / ethyl acetate 9: TFA / acetonitrile; H2O / 40 °C 10: H2 / 10percent Pd-C / methanol View Scheme