Question

Complete the following reaction :
(a)
(b)
( c)
(d)
( e)
(f) `PhCHO overset(N_(3)H//H^(o+))underset(Delta)rarr (B) overset(H_(3)O^(o+))rarr (C) +(D)`
(g)

Answer 1

(a) It is an example of Curtius reaction.

(b) It is an example of Lossen rearrangement reaction.

( c) It is an example of Hofmann bromamide rearrangement reaction.

(d) It is an example of Lossen rearrangement reaction.

( e) Claisen-Schmidt rearrangement type reaction. Proceed direct, put `(NH)` group between `(Me)` and `(C=O)` groups (less `EDG` migrates, `ED` order `Ar gt H gt R`)

(f) Similar to problem `(e)` above. Proceed direct, put `(NH)` between `(Ph)` and `(C= O)` groups.

(g) It is an example of Lossen rearrangement reaction.

(h) It is an example of Arndt-Eistert rearrangement reaction.

(i) It is an example of Reformatsky reaction.
.