JEE PYQ: Aldehydes And Ketones Question 17
Question 17 - 2020 (04 Sep Shift 1)
The number of chiral centres present in [B] is ____.
Cyclohexane nitrile derivative $\xrightarrow{\text{C}_2\text{H}_5\text{MgBr, H}_3\text{O}^+}$ [A] $\xrightarrow{\text{CH}_3\text{MgBr, H}_2\text{O}}$ [B]
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Answer: 4
Solution
The nitrile reacts with EtMgBr to give ketone [A], which reacts with CH$_3$MgBr to give tertiary alcohol [B] with 4 chiral centres.
BETA
