Solvent-free procedure for the regeneration of carbonyl compounds from nitrogeneous derivatives using dioxane-dibromide/SiO2

Abstract

A solvent-free procedure is developed for the regeneration of carbonyl compounds from aldoximes or ketoximes by grinding at room temperature and from hydrazone, phenylhydrazone or semicarbazone derivatives under microwave irradiation using dioxane-dibromide/SiO2. Products are obtained in excellent yields and are in a state of high purity.