In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called The oxidation of pyridines catalyzed by surfactant-encapsulated polyoxometalate [(C18H37)2(CH3)2N]8[HBW11O39] with the temperature-responsive property of solubility, published in 2013, which mentions a compound: 2402-95-1, Name is 2-Chloropyridine 1-oxide, Molecular C5H4ClNO, Name: 2-Chloropyridine 1-oxide.
Temperature-responsive characterization of solubility based on a surfactant-encapsulated polyoxometalate ([(C18H37)2(CH3)2N]8[HBW11O39]) in tert-Bu alc. was described and used in catalytic oxidation of pyridines. The catalyst could be recovered and reused several times by controlling the temperature
If you want to learn more about this compound(2-Chloropyridine 1-oxide)Name: 2-Chloropyridine 1-oxide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(2402-95-1).
Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem