Identify the reaction name from the options

The named reductions given are:

• Wolff–Kishner reduction: converts aldehydes/ketones to hydrocarbons.
• Etard reaction: oxidation of a benzylic methyl group to an aldehyde.
• Stephen reduction: reduction of nitriles to aldehydes.
• Rosenmund reduction: reduction of acid chlorides to aldehydes using hydrogen over poisoned palladium catalyst.

Match the reaction type

The reaction referred to here is the reduction of an acid chloride to an aldehyde:

This is specifically called the Rosenmund reduction.

Check the options

• A: Wolff-Kishner reduction $\rightarrow$ incorrect
• B: Etard reduction $\rightarrow$ incorrect
• C: Stephen reduction $\rightarrow$ incorrect
• D: Rosenmund reduction $\rightarrow$ correct

Final answer

The reduction reaction is Rosenmund reduction.