1: 1) PPh3, 2) H2O / 1) THF, ambient temperature, 10 h, 2) THF, 10 h 2: pyridine / 0.5 h 3: 70 percent / H2 / Pd(OH)2/C / ethanol View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: pyridine / CH₂Cl₂ / 0.25 h<br />2: NaN₃ / dimethylformamide / 1 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 74 percent / sodium bicarbonate / CH₂Cl₂; methanol / 0.5 h / Ambient temperature<br />2: pyridine / CH₂Cl₂ / 0.25 h<br />3: NaN₃ / dimethylformamide / 1 h / Ambient temperature<br /> <br /> &nbsp;