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Q: Why it is necessary to remove alpha hydrogen in aldol condensation?
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Why benzaldehyde does not undergo aldol condensation?

Only those aldehydes may undergo the aldol condensation which have the alpha hydrogen (hydrogen at carbon adjacent to carbonyl carbon) in benzaldehyde alpha carbon is not present so it can not undergoes the aldol condensation.


How propanol does under go aldol condensation?

Compounds which have CH3CO- group or compounds that can be converted to CH3CO- group undergo aldol condensation. 1-propanol doesn't undergo aldol condensation. However 2-propanol undergoes aldol condensation.


What' s the different between Aldol condensation and Claisen condensation?

Aldol condensation is the reaction of two aldehydes in the presence of a basic catalyst. The aldol condensation leads to an aldol product, in which an hydroxyl group is attached to the beta carbon of an aldehyde. Claisen condensation is similar to aldol condensation, but is involves two esters instead of two aldehydes. The product of a Claisen condensation is a beta-keto-ester, a compound characterized by an ester with its alpha carbon being a ketone.


Why aldol condensation is called condensation reaction?

All condensation reactions proceed with formation of water (H2O). If you look at the reaction mechanism for Aldol condensation, you will observe that water is formed as an end-product of the reaction.


Difference between claisen schmdit reaction and aldol condensation?

The Claisen-Schmidt reaction involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form an α,β-unsaturated carbonyl compound. In contrast, aldol condensation involves the condensation of an aldehyde or ketone with itself to form a β-hydroxy carbonyl compound. The key difference is the presence of two different carbonyl compounds in the Claisen-Schmidt reaction, while aldol condensation involves one carbonyl compound reacting with itself.


Does acetophenone undergo aldol condensation?

Yes it does, as it has CH3CO- group.


Can propanedial be easily prepared by a simple Claisen condensation?

Not really because aldol condensation of 2 CH3CHO would be a major competing process.


Which compound formation results by aldol condensation of acetaldehyde?

crotonaldhyde CH3-CH=CH-CHO


Principle invovled in the synthesis of dihydropyrimidinone?

ethyl acetate undergoes aldol condensation with benzaldehyde. in the aldol product the aceto group undergoes enolisation. Urea attacks through 1,4 addition.


What is role of base in aldol condensation?

Actually the base eg OH group attacks on the alpha Hydrogen atom thus releasing the carbanion and itself forming water. The carbanion further reacts with another aldehyde molecule forming methoxide ion which reacts with water to form aldol product and releases the OH group.


Is 2-hydroxy-2-methyl pentanal a product of aldol condensation?

no, the hydroxyl group must be beta not alpha to the carbonyl group


What do you expect when aldol condensation product of ethanal ozonolysis?

well based on my studies two compounds are produced, viz: ethanedial and methanal