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Further Information

Related Reactions
Fukuyama Reduction
Reduction of carboxylic compounds

Rosenmund Reduction

The catalytic hydrogenation of acid chlorides allows the formation of aldehydes.

Mechanism of the Rosenmund Reduction

Side products:

The Pd catalyst must be poisoned, for example with BaSO4, because the untreated catalyst is too reactive and will give some overreduction. Some of the side products can be avoided if the reaction is conducted in strictly anhydrous solvents.