The reaction of RCONH_2 with bromine and KOH | vedclass

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(C) The given reaction is the Hoffmann-Bromamide degradation reaction. In this reaction,the amide $(RCONH_2)$ reacts with $Br_2$ and $KOH$ to form an

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$RN=C=O$

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(C) The given reaction is the Hoffmann-Bromamide degradation reaction. In this reaction,the amide $(RCONH_2)$ reacts with $Br_2$ and $KOH$ to form an $N$-bromamide intermediate $(RCONHBr)$,which then undergoes rearrangement to form an isocyanate intermediate $(RN=C=O)$. Finally,the isocyanate is hydrolyzed to form the primary amine $(RNH_2)$. Both $RCONHBr$ and $RN=C=O$ are intermediates,but $RN=C=O$ (alkyl isocyanate) is the key intermediate formed during the rearrangement step.

The reaction of $RCONH_2$ with bromine and $KOH$ gives $RNH_2$ as the end product. Which one of the following is the intermediate product formed in this reaction?

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