CH_3CO_2C_2H_5 on reaction with sodium ethoxi | vedclass

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(C) Step $I$: Ethyl acetate $(CH_3CO_2C_2H_5)$ undergoes Claisen condensation in the presence of sodium ethoxide $(NaOC_2H_5)$ to form ethyl acetoacet

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(C) Step $I$: Ethyl acetate $(CH_3CO_2C_2H_5)$ undergoes Claisen condensation in the presence of sodium ethoxide $(NaOC_2H_5)$ to form ethyl acetoacetate $(CH_3COCH_2COOC_2H_5)$,which is compound $A$.Step $II$: Ethyl acetoacetate,when heated in the presence of an acid,undergoes decarboxylation and dehydration/rearrangement to form the cyclic compound shown in the provided image (a derivative of cyclobutanone or similar cyclic structure as per the reaction mechanism provided in the image).

$CH_3CO_2C_2H_5$ on reaction with sodium ethoxide in ethanol gives $A$,which on heating in the presence of acid gives $B$. Compound $B$ is

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