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.