Which beta-keto acid shown will not undergo d | vedclass

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(B) Decarboxylation of $\beta$-keto acids typically proceeds through a cyclic six-membered transition state to form an enol intermediate,which then ta

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(B) Decarboxylation of $\beta$-keto acids typically proceeds through a cyclic six-membered transition state to form an enol intermediate,which then tautomerizes to a ketone.Option $B$ represents a bicyclic $\beta$-keto acid where the carboxyl group is at the bridgehead position.Decarboxylation would require the formation of a double bond at the bridgehead position in the resulting enol intermediate.According to Bredt's rule,the formation of a double bond at the bridgehead of a small bicyclic system is highly unstable and prohibited.Therefore,the compound in option $B$ will not undergo decarboxylation.

Which $\beta$-keto acid shown will not undergo decarboxylation?

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