The reaction in which aldehyde or ketone react with phosphorus ylide to give alkenes and triphenyl phosphine oxide. Actually ylide is a neutral molecule having a negative carbon adjacent to a positive heteroatoms. This phosphorus ylide is also called phosporanes. Thus phosphorus ylide is easily prepared from triphenyl phosphine and primary or secondary alkyl halides….

                               “The acid-induced reaction that converts oxime to amide is called Beckmann rearrangement”  In the Beckmann rearrangement, migration of the group does not depend upon migration aptitude but depends upon the orientation of the group related to a hydroxyl group. In…

The reaction in which the conversion of amides to amine with one carbon atom less than the starting material in the presence of Br2 and KOH or alkaline Hypohalite is called Hoffmann rearrangement. This rearrangement was given by Agust Wilhem. Reaction :   Mechanism of the Hofmann Rearrangement: Step 1: Deprotonation of amide by Base…