Pyridine N-oxides 3 are exclusively formed under particularly mild conditions when perfluorinated dialkyloxaziridines 1 are reacted with pyridine derivatives 2 bearing a substituent at the 2-position. Starting from pyridines substituted at the 3- and 4-positions, the previously unreported N-perfluoroacylpyridiniumaminides 4 are also produced and isolated as solid, stable compounds. Bis(pyridinium-N-aminides) 9, which have been prepared starting from bis-pyridine substrates and pyridazine and quinoxaline starting materials, also show the same reactivity. This behaviour reveals how oxaziridines 1 can work as both aminating and oxygenating agents.
在特别温和的条件下,当
全氟代二烷基氧杂
环丁烷1与在2位带有取代基的
吡啶衍生物2反应时,只能生成
吡啶N-氧化物3。从在3位和4位被取代的
吡啶出发,还会生成并分离得到先前未报道的N-
全氟酰基
吡啶季
铵胺4,它们是固态稳定的化合物。从双
吡啶底物以及
吡嗪和
喹喔啉起始物出发制备的双(
吡啶季
铵胺)9,也表现出相同的反应活性。这种现象揭示了氧杂
环丁烷1既能充当胺化剂也能作为氧化剂的双重功能。