Amberlyst 15, a superior, mild, and selective catalyst for carbonyl regeneration from nitrogeneous derivatives

Abstract

Various tosylhydrazones, oximes, 2,4-dinitrophenylhydrazones, and semicarbazones were converted into the corresponding carbonyl compounds, mostly in quantitative yields, via equilibrium exchange with aqueous acetone, by use of Amberlyst 15 as acidic catalyst. Good results were obtained also with aldehyde derivatives. Groups which are acid-sensitive survive under these reaction conditions.