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CGP EDU Academic Team
Published on: August 13, 2026
This reaction takes place between two molecules of esters (same or different). One ester should have at least one α -hydrogen which behaves as a reagent. The reaction is catalysed by strong base like C2H5 
in presence of C2H5OH. The product of this reaction is β -ketoester
(i) Which of the following esters will not undergo Claisen condensation ?
A
CH3COOC2H5 4 cross products
B
C6H5COOC2H5 2 simple and 2 cross products
C
HCOOC2H5 3 cross products and one simple product
D
C6H5–COOC2H5 (ii) Which of the following esters will undergo Claisen condesation to form acetoacetic ester? None of these (iii) When two esters having α -hydrogens are subjected to Claisen condensation then we get : 4 simple products
Text Solution
Verified by ExpertsThe correct answer is:
B
(i)
Sol. C6H5–COOC2H5
(ii)
Sol. CH3COOC2H5
(iii)
Sol. 2 simple and 2 cross products
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