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In the synthesis of pyridine by Chichibabin synthesis, synthesis of acroloien is done which method?

In the synthesis of pyridine by Chichibabin synthesis, synthesis of acroloien is done which method? Correct Answer Knoevenagel Condensation

Acrolein is formed in a Knoevenagel condensation from the acetaldehyde and formaldehyde. It is then condensed with acetaldehyde and ammonia into dihydropyridine.

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