The end product (C) of the reaction is: | vedclass

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(B) $1$. The starting material is ethyl acetoacetate,which contains both a ketone and an ester functional group. $2$. The first step involves the reac

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(B) $1$. The starting material is ethyl acetoacetate,which contains both a ketone and an ester functional group. $2$. The first step involves the reaction with ethylene glycol in the presence of an acid catalyst $(H^+)$. Since ketones are more reactive towards nucleophilic addition than esters,the ketone group is selectively protected as a cyclic acetal. $3$. The second step involves the reaction with $2$ equivalents of $PhMgBr$ (a Grignard reagent). The Grignard reagent attacks the ester group,leading to the formation of a tertiary alcohol after the addition of two phenyl groups. $4$. The final step is the acid-catalyzed hydrolysis $(H_3O^+)$,which deprotects the cyclic acetal back to the ketone. $5$. The final product $(C)$ is $CH_3COCH_2C(OH)(Ph)_2$.

The end product $(C)$ of the reaction is:

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