JEE Main Chemistry question

PhCOCH₃ --(i) Br₂ (1 eq.) (ii) LAH, OH⁻--> [X] --OH⁻--> [Y]. Here Y is

(A)An epoxide (styrene oxide-type)
(B)PhCH(OH)CH₂OH (a 1,2-diol)Correct
(C)An α-hydroxy acid
(D)PhCH₂CH₂OH

Answer: (B)

Solution

α-Bromination of acetophenone gives PhCOCH₂Br; LiAlH₄ reduces the ketone carbonyl to a secondary alcohol, giving the bromohydrin PhCH(OH)CH₂Br (X). Treatment with OH⁻ then performs intramolecular SN2

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Question ID VK-149376