Polyphosphoric Acid Catalyzed C−H Dinitration of Passivated Aromatic Compounds with Potassium Nitrate under Mild Condition

Abstract Dinitroaromatics are valuable organic compounds. However, the high value of these compounds is accompanied by significant risks and formidable challenges. Herein, we report a safe and highly efficient method for the dinitration of various aromatic compounds, using KNO 3 as nitrating agent, polyphosphoric acid as solvent and catalyst. This approach provides a safer and more efficient alternative to the traditional mixed acid system, making it suitable for a range of substrates, especially highly deactivated arenes.