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Question

Predict the major product of the given reaction

A
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B
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C
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D
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Solution

The correct option is D
The substrate have amine group which is a neighbouring group. It will act as nucleophile and result in the SNNGP reaction.

When a nucleophile is a part of the reacting molecule, the substitution process is known as intramolecular SNNGP.

Mechanism of the given reaction:

In step (a), it undergoes ring expansion to form a stable six membered ring. Hence, it is the major product.

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