Q15 · CSIR NET Chemistry, June 2015
Paper: CSIR NET June 2015 · Subject: Organic Chemistry · Chapter: Reagents, Reaction Mechanisms & Named Reactions · Topic: Reagents, Reaction Mechanisms & Named Reactions – General · Marks: 2 · Difficulty: Easy
The major product formed in following reaction sequence is 
(a)A = 
B = 
B = (b)A = 
B = 
B = (c)A = 
B = 
B = (d)A = 
B = 
B = Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Sharpless kinetic resolution with 0.5 equivalent of oxidant: the matched enantiomer of the secondary allylic alcohol is epoxidised to the erythro epoxy alcohol A, and the unreacted enantiomer B is recovered (a).
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