BECKMANN REARRANGEMENT

Curtius Reaction||Lossen Reaction|| Beckmann's Rearrangement||Cumene hydroperoxide Rearrangement

Lossen Rearranement || Beckmann Rearrangment || Bayer Villiger Oxidation ||Cummene Hydro Peroxide Reaction

In organic chemistry various reactions take place by rearrangements. These rearrangements can be classified on the basis of migratory group and its nature. One of the well-known rearrangement is the formation of N-substituted amides by rearrangement of aldoximes or ketoximes. This is known as Beckmann rearrangement. It is catalysed by various acidic reagents. The mechanism of this reaction is given as (CH_(3))(C_(2)H_(5))C=NOH overset(C_(6)H_(5)SO_(2)Cl)to (A)overset(H_(2)O //H^(o+))to CH_(3)NH_(2)+C_(2)H_(5)COOH The formation of final product suggest the migration of :

Curtius Rearrangement

Fries Rearrangement

Lossen Rearrangement

The given is mechanism of Beckmann rearrangment. Rate determining step in the Beckmann rearrange- ment is