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Carbonyl condensation reactions

Description

These reactions are initiated by deprotonation of the weakly acidic hydrogen to give a resonance-stabilized enolate ion (top).

In an aldol condensation (left side), the enolate adds to an aldehyde or ketone, yielding a b-hydroxy carbonyl product.

In a Claisen condensation (right side), the enolate adds to an ester, yielding a b-keto product.
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