hydrogen; acetic acid; isopropyl alcohol; palladium on activated charcoal Yield given. Multistep reaction;

<b>Multi-step reaction with 2 steps<br /> </b>1: 69 percent / N,N'-diciclohexylcarbodiimide / 1,2-dimethoxy-ethane / 20 h / 4 &deg;C<br />2: 38 percent / triethylamine / dimethylformamide / 48 h / Ambient temperature<br /> <br /> &nbsp;