JEE PYQ: Aldehydes And Ketones Question 24
Question 24 - 2020 (09 Jan Shift 2)
A $\xrightarrow{\text{Br}_2/h\nu}$ $\xrightarrow{\text{alc. KOH}}$ $\xrightarrow{\text{O}_3/(CH_3)_2S}$ $\xrightarrow{\text{NaOH, }\Delta}$ cyclopentanecarbaldehyde. A is:
(1). (Cyclohexane)
(2). (Methylcyclopentane)
(3). (Norbornane)
(4). (Methylcyclohexane)
Show Answer
Answer: (1)
Solution
Cyclohexane $\to$ bromocyclohexane $\to$ cyclohexene $\to$ hexanedial (ozonolysis) $\to$ cyclopentanecarbaldehyde (intramolecular aldol).
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