Beckmann rearrangement

In chemistry, the Beckmann rearrangement is the rearrangement of a ketoxime to the corresponding amide in concentrated sulfuric acid, phosphorus pentachloride or a few other catalysts. The oxime is formed by the reaction of a ketone with hydroxylamine.

This example reaction starting with cyclohexanone to the caprolactam is the most important application of the Beckmann rearrangement. The caprolactam is hydrolysed and then polymerized to Nylon.