Synthesis of cinnamaldehyde by using the suitable reagents should be identified. Concept introduction: Aldol condensation reaction is where the aldol addition product undergoes dehydration to give a conjugated enone. In organic chemistry condensation reaction means loss of small molecules. For aldol condensation reaction to take place the starting material should have two α hydrogens in the same carbon atom. The driving force for aldol condensation reaction is the formation of conjugated system. The steps involved in aldol condensation reaction are, Deprotonation of α carbon Attach of enolate ion with the aldehyde ( nucleophilic attack ) Protonation of the alkoxide ion to give aldol product Dehydration of the aldol addition product to form conjugated enone (aldol condensation product) Please note that aldol condensation product is formed at higher temperature . Note : Simple way to find the starting materials for aldol condensation product is to find the carbon-carbon double bond in the product. Break the bond and add oxygen to the β position and two hydrogens to the α positions.

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Chapter 21, Problem 66PP

Interpretation Introduction

Interpretation:

Synthesis of cinnamaldehyde by using the suitable reagents should be identified.

Concept introduction:

Aldol condensation reaction is where the aldol addition product undergoes dehydration to give a conjugated enone. In organic chemistry condensation reaction means loss of small molecules. For aldol condensation reaction to take place the starting material should have two α hydrogens in the same carbon atom. The driving force for aldol condensation reaction is the formation of conjugated system. The steps involved in aldol condensation reaction are,

Deprotonation of α carbon

Attach of enolate ion with the aldehyde (nucleophilic attack)

Protonation of the alkoxide ion to give aldol product

Dehydration of the aldol addition product to form conjugated enone (aldol condensation product)

Please note that aldol condensation product is formed at higher temperature.

Note : Simple way to find the starting materials for aldol condensation product is to find the carbon-carbon double bond in the product. Break the bond and add oxygen to the β position and two hydrogens to the α positions.

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