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Question
How will you bring about the following conversion?
But-1-ene to but-2-ene
Solution
\[\begin{array}{cc}
\ce{\underset{But-1-ene}{CH3CH2CH = CH2} ->[HBr][Markonikoff's rule] CH3 - CH2 - CH - CH3 ->[Alc. KOH, \Delta][-HBr] \underset{But-2-ene}{CH3 - CH = CH - CH3}}\\
\phantom{....}|\\
\phantom{.....}\ce{\underset{2-Bromobutane}{Br}}
\end{array}\]
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