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Chapter 23: Q38E (page 783)

The Knoevenagel reaction is a carbonyl condensation reaction of an ester with an aldehyde or ketone to yield an α,β-unsaturated product. Show the mechanism for the Knoevenagel reaction of diethyl malonate with benzaldehyde.

Short Answer

Expert verified

Benzaldehyde reacts with diethyl malonate to produce cinnamic acid.

Step by step solution

01

Reaction

The Knoevenagal reaction is a carbonyl condensation reaction of an ester with an aldehyde or ketone to yield α,β-unsaturated product.

The given reaction is,

02

Mechanism

The mechanism for the above process is as follows,

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