Facile N-Nitrosation of Secondary Amines Using Poly(N,N'-dibromo-Nethylene- benzene-1,3-disulfonamide)and N,N,N',N'-tetrabromobenzene- 1,3-disulfonamide/NaNO2 Under Mild Conditions

In this research project, a combination of poly(N,N'-dibromo-N-ethylene-benzene-1,3-disulfonamide) [PBBS] and/or(N,N,N',N'-tetrabromobenzene-1,3-disulfonamide) [TBBDA] with sodium nitrite in the presence of wet SiO2 (50% w/w) was used as an efficient nitrosating agent for the conversion of secondary amines to their corresponding nitroso compounds. N-Nitrosation reaction has been performed in dichloromethane at room temperature under mild and heterogeneous conditions. The reaction is operationally simple and corresponding products were achieved in good to excellent yields.