Question

How the following conversions can be carried out?
ethanol to but$-1-$ yne

Answer 1

$\underset{ethanol}{C{H}_{3}C{H}_2-OH}\stackrel{SOC{l}_2}{\to }C{H}_{3}C{H}_2-Cl\stackrel{HC\equiv CNa}{\to }\underset{but-1-yne}{C{H}_{3}C{H}_{2}C\equiv CH}$

In the given reaction, ethanol is first treated with $SOC{l}_2$ to give ethyl chloride.

When ethyl chloride is treated with sodium acetylide it gives but-1-yne.