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Q.

Fries rearrangement involves

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a

migration of - COOH group

b

migration of acyl group

c

migration of -OH group

d

migration of - CHO group

answer is A.

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Detailed Solution

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Fries Rearrangement is an organic rearrangement reaction in which an aryl ester is transformed into a hydroxy aryl ketone with the help of a Lewis acid catalyst and an aqueous acid.
In this reaction, an acyl group belonging to the phenolic ester migrates to the aryl ring.

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Fries rearrangement involves