Problem: Which of the following esters cannot undergo a Claisen condensation?

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We are asked which of the following esters cannot undergo a Claisen condensation.


Claisen condensation starts with the formation of enolate. 

If enolate cannot form, the reaction is impossible. 


Identify if the molecule has alpha hydrogens that can be remover to form an enolate.


The structure below has alpha hydrogens and therefore can undergo Claisen Condensation:




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Problem Details

Which of the following esters cannot undergo a Claisen condensation?

Which of the following esters cannot undergo a Cla