Which of the following undergoes decarboxylat | vedclass

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(B) Decarboxylation of carboxylic acids upon heating is facilitated by the presence of an electron-withdrawing group at the $\beta$-position,such as a

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(B) Decarboxylation of carboxylic acids upon heating is facilitated by the presence of an electron-withdrawing group at the $\beta$-position,such as a carbonyl group ($\beta$-keto acid). This is because the reaction proceeds through a cyclic six-membered transition state,which is stabilized by the formation of an enol intermediate. Among the given structures,option $B$ represents a $\beta$-keto acid (specifically,$2$-phenyl-$3$-oxopentanoic acid),where the carboxyl group is at the $\alpha$-position relative to the carbonyl group. Therefore,it undergoes decarboxylation most readily.

Which of the following undergoes decarboxylation most readily on being heated?

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