The reaction of acetophenone with benzaldehyd | vedclass

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Question

(A) The reaction between acetophenone $(Ph-CO-CH_3)$ and benzaldehyde $(Ph-CHO)$ in the presence of an acid catalyst $(HCl)$ and heat is a Claisen-Sch

Vedclass · Accepted Answer

$Ph-CO-CH=CH-Ph$

Vedclass · Answer

(A) The reaction between acetophenone $(Ph-CO-CH_3)$ and benzaldehyde $(Ph-CHO)$ in the presence of an acid catalyst $(HCl)$ and heat is a Claisen-Schmidt condensation,which is a type of cross-aldol condensation.$1$. The acetophenone acts as the nucleophile by forming an enol.$2$. The benzaldehyde acts as the electrophile.$3$. The reaction proceeds through the formation of a $\beta$-hydroxy ketone intermediate,followed by dehydration (loss of $H_2O$) under heating to form an $\alpha,\beta$-unsaturated ketone.$4$. The final product is benzalacetophenone (chalcone),which is $Ph-CO-CH=CH-Ph$.

The reaction of acetophenone with benzaldehyde in the presence of $HCl$ and heat produces product $(A)$. Identify $(A)$.

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