Arrange the following amides according to their relative reactivity when treated with $B r_{2}$ in excess of strong base.

P > Q > R > S

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R > S > P > Q

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Q > P > S > R

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S > P > Q > R

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Solution

The correct option is B R > S > P > Q
Since this reaction is carried out in basic medium, $N H_{2}$ proton will be abstracted much more fastly when electron withdrawing group like $N O_{2}$ will be attached. So $R$ will be very faster in the reactivity.

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Similar questions

B r_{2}

B r_{2}

P : [(⇁ p \lor q) \land (r \to s) \land (p \lor r)] \to (⇁ s \to q)

Q : [(⇁ p \land q) \land [q \to (p \to r)]] \to⇁ r

R : [[(q \land r) \to p] \land (⇁ q \lor p)] \to r

S : [p \land (p \to r) \land (q \lor ⇁ r)] \to q

S_{N} 2

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