Which of the following compounds will undergo | vedclass

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(B) Decarboxylation on heating occurs readily in compounds that have a carbonyl group at the $\beta$-position relative to the carboxylic acid group ($

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$3$ and $4$

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(B) Decarboxylation on heating occurs readily in compounds that have a carbonyl group at the $\beta$-position relative to the carboxylic acid group ($\beta$-keto acids). Compound $3$ is a $\beta$-keto acid,which forms a stable six-membered cyclic transition state upon heating,leading to the loss of $CO_2$. Compound $4$ is a gem-dicarboxylic acid (specifically,a malonic acid derivative),which also undergoes decarboxylation upon heating to form a monocarboxylic acid. Therefore,both $3$ and $4$ will undergo decarboxylation on heating.

Which of the following compounds will undergo decarboxylation on heating?

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