C-Nitration of pyridine by the kyodai-nitration modified by the Bakke procedure. A simple route to 3-nitropyridine and mechanistic aspect of its formation

Article abstract of DOI:10.1016/S0040-4039(97)01229-X

N-Nitropyridinium nitrate was generated in situ from pyridine, nitrogen dioxide and ozone in an inert organic solvent and subsequently treated with aqueous sodium hydrogen sulfite to afford 3-nitropyridine in good yield, together with sodium pyridine-4-sulfonate as a water-soluble by-product.