Question

Which is Rosenmund reduction?

Hint:

Rosenmund reduction selectively reduces acyl chlorides to aldehydes without further reducing them to alcohols.

Answer 1

Step 1: Definition of Rosenmund Reduction.
The Rosenmund reduction is a chemical reaction in which an acyl chloride is reduced to an aldehyde using hydrogen and a palladium catalyst poisoned with sulfur or quinoline. It is typically used to convert aryl acyl chlorides into the corresponding aldehydes.
Step 2: Example.
For example, benzoyl chloride (\( \text{C}_6\text{H}_5\text{COCl} \)) is reduced to benzaldehyde (\( \text{C}_6\text{H}_5\text{CHO} \)) using hydrogen gas in the presence of a poisoned palladium catalyst.