Base catalyzed rearrangement in which α-halo ketone or cyclopropane having at least one α-H reacts with base give carboxylic acid or their derivatives. In favorskii rearrangement, the base decides our product e.g. if alkoxide is used as a base then an ester will be formed. If hydroxide is used as a base then carboxylic acid…

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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…

An Acid catalyzed rearrangement in which 1,2-diol or pinacole is converted to carbonyl compound is called pinacole- pinacolone rearrangement. Pinacole : 2,3- dimethyl butane-2,3-diol  Pinacolone :3,3-dimethyl-2- butanone Reaction of Pinacole-pinacolone rearrangement: Mechanism of pinacole-pinacolone rearrangement: Mechanism of pinacole-pinacolone rearrangement takes place in four steps Step(01): In this step hydroxyl group of pinacole is protonated by…