1: dicyclohexylcarbodiimide; 1-hydroxybenztriazole 2: hydrogen / Pd black View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 10percent aq. HCl / tetrahydrofuran / 1 h / Ambient temperature<br />2: NaIO₄ / H₂O; tetrahydrofuran / 48 h / Ambient temperature; pH 3<br />3: Na₂CO₃ / H₂O / Ambient temperature<br /> <br /> &nbsp;