One-pot Nitration of Phenols under Mild and Heterogeneous Conditions

Nitrophenols can be obtained via nitrosation–oxidation of phenols with Oxone®, NaNO 2 and wet SiO 2 at room temperature in moderate to high yields. In situ generation of HNO 2 and the radical cation mechanism via the nitrous acid catalysed (NAC) pathway or hydrogen abstraction involving NO 2 appear to be applicable to phenol nitration using these reagents.