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JEE PYQ: Aldehydes And Ketones Question 39

Question 39 - 2019 (10 Jan Shift 2)

Diester $\xrightarrow{\text{NaOEt}/\Delta}$ ?

(1). (5-membered fused ring)

(2). (6-membered fused ring)

(3). (Dieckmann condensation product (fused bicyclic $\beta$-ketoester))

(4). (Spiro product)

Show Answer

Answer: (3)

Solution

Intramolecular Claisen (Dieckmann) condensation with NaOEt gives fused bicyclic $\beta$-ketoester.


Learning Progress: Step 39 of 49 in this series