Question

Explain Rosenmund reduction reaction.

Answer 1

Rosenmund Reduction: Acyl chloride R - CO - Cl is reduced to the corresponding aldehyde using palladium in the presence of barium sulphate (BaSO₄). This reaction is known as the Rosenmund reduction reaction.

\[\begin{array}{cc}
\ce{R - C - Cl ->[H2][pd - BaSO4] \underset{(Aldehyde)}{RCHO} + HCl}\\
||\phantom{..........................}\\
\ce{\underset{(Acyl chloride)}{O}}\phantom{..........................}
\end{array}\]