The amino ketone shown below undergoes a spon | vedclass

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(C) The given molecule is $o$-amino ketone,specifically $2-(2-aminopropyl)acetophenone$ derivative. Upon standing,the primary amine group $(NH_2)$ und

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$2-$methyl$-3,4-$dihydroquinoline

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(C) The given molecule is $o$-amino ketone,specifically $2-(2-aminopropyl)acetophenone$ derivative. Upon standing,the primary amine group $(NH_2)$ undergoes a nucleophilic attack on the carbonyl carbon $(C=O)$ of the ketone group. This is an intramolecular condensation reaction (dehydration) that leads to the formation of an imine. The cyclization results in the formation of a six-membered nitrogen-containing ring,specifically a dihydroquinoline derivative. Based on the structure,the product formed is $2-methyl-3,4-dihydroquinoline$.

The amino ketone shown below undergoes a spontaneous cyclization on standing. What is the major product of this intramolecular reaction?

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