Question

Give the expected products for the aldol condensations of

1. propanal.
2. phenylacetaldehyde
3. pentan-3-one.

Short answer

Nothing

Step-by-step solution

Aldol condensation

Aldol Condensations are some of the most important enolate reactions of carbonyl compounds.

In this reaction, two or more molecules combine, often with the loss of a small molecule such as water or alcohol, forming the product known as aldol.

Aldol reaction takes place in two mediums:

• Acidic medium
• Basic medium

Aldol condensation of propanal

Propanal reacts with the hydroxide ion to form the enolate, which serves as a nucleophile. Then the enolate nucleophilic attack on another molecule of propanal. In the last step, Protonation gives the aldol product which is.

Aldol condensation of phenylacetaldehyde

Phenylacetaldehyde reacts with the hydroxide ion to form the enolate, which serves as a nucleophile. Then the enolate nucleophilic attack on another molecule of phenylacetaldehyde. In the last step, Protonation gives the aldol product, which is.

Aldol condensation of pentan-3-one

Pentan-3-one reacts with the hydroxide ion to form the enolate, which serves as a nucleophile. Then the enolate nucleophilic attack on another molecule of pentan-3-one. In the last step, Protonation gives the aldol product, which is.