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 Aqueous biphasic oxidation: a water-soluble polyoxometalate catalyst for selective oxidation of various functional groups with hydrogen peroxide, published in 2004-02-29, which mentions a compound: 2402-95-1, Name is 2-Chloropyridine 1-oxide, Molecular C5H4ClNO, Recommanded Product: 2-Chloropyridine 1-oxide.
A “”sandwich”” type polyoxometalate, Na12[WZn3(H2O)2][(ZnW9O34)2], was used as an oxidation catalyst in aqueous biphasic reaction media to effect oxidation of alcs., diols, pyridine derivatives, amines and aniline derivatives with hydrogen peroxide. The catalyst was shown by 183W NMR to be stable in aqueous solutions in the presence of H2O2 and showed only minimal non-productive decomposition of the oxidant. Secondary alcs. were selectively oxidized to ketones, while primary alcs. tended to be oxidized to the corresponding carboxylic acids, although secondary alcs. were selectively oxidized in the presence of primary alcs. Vicinal diols yielded carbon-carbon bond cleavage products in very high yields. Pyridine derivatives were oxidized to the resp. N-oxides, but strongly electron-withdrawing moieties inhibited the oxidation reaction. Primary amines were oxidized to the oximes, but significantly hydrolyzed in situ. Aniline derivatives were oxidized to the corresponding azoxy or nitro products depending on the substitution pattern in the aromatic ring. Catalyst recovery and recycle was demonstrated.
As far as I know, this compound(2402-95-1)Recommanded Product: 2-Chloropyridine 1-oxide can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem