(a)
Interpretation: The carbonyl starting materials that are needed to prepare the given compound by using a directed aldol reaction are to be identified.
Concept introduction: The directed aldol reaction is a type of cross aldol reaction. This directed aldol reaction categorizes the carbonyl compounds into the nucleophilic enolate and other the carbonyl compound which can react at the electrophilic carbonyl carbon atom.
(b)
Interpretation: The carbonyl starting materials that are needed to prepare the given compound by using a directed aldol reaction are to be identified.
Concept introduction: The directed aldol reaction is a type of cross aldol reaction. This directed aldol reaction categorizes the carbonyl compounds into the nucleophilic enolate and other the carbonyl compound which can react at the electrophilic carbonyl carbon atom.
(c)
Interpretation: The carbonyl starting materials that are needed to prepare the given compound by using a directed aldol reaction are to be identified.
Concept introduction: The directed aldol reaction is a type of cross aldol reaction. This directed aldol reaction categorizes the carbonyl compounds into the nucleophilic enolate and other the carbonyl compound which can react at the electrophilic carbonyl carbon atom.
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