JEE PYQ: Aldehydes And Ketones Question 44
Question 44 - 2019 (12 Jan Shift 1)
2-cyclopenten-1-one $\xrightarrow{\text{NaBH}_4/\text{EtOH}}$ ?
(1). (2-cyclopenten-1-ol (allylic alcohol))
(2). (Cyclopentanol (fully reduced))
(3). (Cyclopentanone (only C=C reduced))
(4). (Cyclopentanol with OH)
Show Answer
Answer: (1)
Solution
NaBH$_4$ does not reduce C=C double bond but reduces C=O to CHOH. Product: 2-cyclopenten-1-ol.