Dieckmann condensation

############################# Video Source: www.youtube.com/watch?v=rX2SWnbITnA

The Dieckmann condensation is identical to the Claisen condensation, but the Dieckmann forms a cyclic product - a cyclic beta-ketoester. The reaction starts with a diester - two ester tethered together by a chain. In the Dieckmann, a base (same OR group as the ester), deprotonates one ester. The resulting enolate attacks the carbonyl of the other ester to form the ring. The reaction progresses and is neutralized with acid to form a cyclic beta-keto ester. The reaction is effective for the synthesis of either 5-membered or 6-membered rings. 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