ABC26OR0436 · Reagents Reaction Mechanisms and Named Reactions
Subject: Organic Chemistry · Chapter: Reagents Reaction Mechanisms and Named Reactions · Topic: Reagents, Reaction Mechanisms & Named Reactions – General · Exam: CSIR-NET DEC 2019 · Marks: 2 · Difficulty: Medium
In the following transformation, the enantiomerically pure lactone A is 
(a)Equimolar amounts of syn and anti diastereomers of B , both of which are racemic.
(b)Equimolar amounts of syn and anti diastereomers of B , both of which are enantiomerically pure.
(c)Only syn diasteroeomer of B, which is racemic.
(d)Only anti diasteromer of B , which is enantiomerically pure.
Answer
Answer (as printed): C
Explanation
The mechanism of the reaction is shown below:
Explanation as extracted from the printed page; notation may be imperfect.