Solid state oxidative deprotection of 1,3-dithianes and 1,3-dithiolanes using poly(N,N'-dibromo-N-ethyl-benzene-1,3-disulfonamide) and N,N,N',N'-tetrabromobenzene-1,3-disulfonamide

A simple and efficient deprotection of 1,3-dithianes and 1,3-dithiolanes of aromatic, aliphatic and α,β-unsaturated aldehydes and ketones in the solvent-free to the corresponding parent carbonyl compounds in excellent yields using poly(N,N'-dibromo-N-ethyl-benzene-1,3disulfonamide) [PBBS], N,N,N',N'-tetrabromobenzene-1,3-disulfonamide [TBBDA] and NBS at room temperature.