Which of the following will not give Hoffmann bromamide reaction … - Vidyadip

MCQ

Which of the following will not give Hoffmann bromamide reaction ?

A
$\begin{matrix}
O \\
|| \\
C{{H}_{3}}-C-N{{H}_{2}} \\
\end{matrix}$
B
$\begin{matrix}
O\, \\
||\,\, \\
Ph-C-N{{H}_{2}} \\
\end{matrix}$
C
$\begin{matrix}
O\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C-NH-Br \\
\end{matrix}$
✓
$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-NH-Ph \\
\end{matrix}$

✓

Answer

Correct option: D.

$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-NH-Ph \\
\end{matrix}$

d
$(d)$ $\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-NH-Ph \\
\end{matrix}$

$N-$ substituted amide will not undergo Hoffmann bromamide reaction because formation of iso- cyanate is not possible.

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