Which of the given compound will not give Hoffmann Bromamide Degradation reaction?

P h - O | | C - N H_{2}

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C H_{3} - O | | C - N H - B r

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P h - O | | C - N (C H_{3})_{2}

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Acetamide

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Solution

The correct option is C $P h - O | | C - N (C H_{3})_{2}$
Primary amide gives Hoffmann bromamide degradation where the product has carbon less than the parent amide. Hence A and C gives Hoffmann bromamide reaction. Option B is a bromamide derived from primary amide hence it will also give Hoffmann bromamide degradation reaction.

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