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Chapter 24: Q.10. (page 962)

Question: What carbonyl starting materials are needed to prepare each compound using a directed aldol reaction?

Short Answer

Expert verified

Answer

a.

b.

c.

Step by step solution

01

Aldol reaction

An aldol reaction involves the formation of a 尾-hydroxy carbonyl compound from two carbonyl compounds (aldehyde or ketone).

02

General aldol reaction

A general aldol reaction is given below:

Aldol reaction

03

Carbonyl compounds used to prepare the given compounds

Cleaving the carbon-carbon (C-C) bond between the carbon adjacent to the carbonyl compound and the one connected to the hydroxyl group and replacing the alcohol group with a carbonyl group gives the structure of the starting materials used.

a.

Cleavage of C-C bond in a.

The starting materials required are cyclohexanone and 2-methyl propanal.

b.

Cleavage of C-C bond in b.

The starting materials required are phenylacetaldehyde and ketone.

c.

Cleavage of C-C bond in c.

The starting materials required are 4-heptanone and benzaldehyde.

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Question: What aldehyde or ketone is needed to prepare each compound by an aldol reaction?
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