Q21 · CSIR-NET Chemistry, December 2014
Paper: CSIR-NET December 2014 · Subject: Organic Chemistry · Chapter: Reagents, Reaction Mechanisms & Named Reactions · Topic: Named Reactions · Marks: 2 · Difficulty: Easy
The major product of the following reaction is: 
(a)
(b)
(c)
(d)
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Zn/AcOH removes the α-bromine of the lactone; PhSeNa displaces the primary alkyl bromide to the selenide; m-CPBA oxidation and heating cause selenoxide syn-elimination to the terminal alkene, giving the allyl lactone (a).
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