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Give the decreasing order of reactivity ...

Give the decreasing order of reactivity of Diels-Alder reactions for the following :

A

`(I)gt (II) gt (III) gt (IV)`

B

`(IV) gt (III) gt (II) gt (I)`

C

`(IV) gt (III) gt (I) gt (II)`

D

`(II) gt (I) gt (III) gt (IV)`

Text Solution

Verified by Experts

The correct Answer is:
B
The Diels-Alder reaction proceeds faster when dienophiles have `bare`-withdrawing groups and dienes have `bare`- donating group.
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