JEE PYQ: Aldehydes And Ketones Question 49
Question 49 - 2019 (12 Jan Shift 2)
Diketone + aldehyde $\xrightarrow{\text{dil NaOH}}$ [A] $\xrightarrow{\text{H}_3\text{O}^+}$ [B]
(1). (A = aldol product, B = cyclized ketone)
(2). (A = aldol, B = diketone)
(3). (A = hydroxyl intermediate, B = rearranged)
(4). (A = hydroxyl aldol, B = cyclized ketone)
Show Answer
Answer: (1)
Solution
Aldol condensation of diketone with aldehyde gives $\beta$-hydroxy ketone [A]. Acid-catalyzed intramolecular cyclization and dehydration gives substituted cyclohexanone [B].
BETA
