1: 86 percent / MnO2 / CHCl3 / 1 h / Ambient temperature 2: ethanol / Heating 3: 97 percent / SOCl2 / CH2Cl2 / 5 h / Ambient temperature 4: 88 percent / NaH / dimethylformamide / 0.17 h / 0 °C View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1.1: chloro-trimethyl-silane / N,N-dimethyl-formamide / 100 &deg;C / |Inert atmosphere; |Sealed tube<br />2.1: hydrogenchloride / ethanol; water / 216 h / |Inert atmosphere; |Reflux<br />3.1: lithium aluminium tetrahydride / tetrahydrofuran / 1 h / 0 - 20 &deg;C / |Inert atmosphere<br />3.2: |Inert atmosphere<br /> <br /> &nbsp;