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Magazine Chapter 24: Q.10. (page 962)
Question: What carbonyl starting materials are needed to prepare each compound using a directed aldol reaction?
Short Answer
Answer
a.
b.
c.
Step by step solution
Aldol reaction
An aldol reaction involves the formation of a hydroxy carbonyl compound from two carbonyl compounds (aldehyde or ketone).
General aldol reaction
A general aldol reaction is given below:
Aldol reaction
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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