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 Synthesis and spectral properties of 2-(5-R-2-furylmethylene)-3-oxobutanenitriles, published in 1993-06-30, which mentions a compound: 2689-65-8, Name is 5-Iodo-2-furaldehyde, Molecular C5H3IO2, Application In Synthesis of 5-Iodo-2-furaldehyde.
Substituted 2-(5-R-2-furylmethylene)-3-oxobutanenitriles I (R = H, halo, Ph, etc.) were obtained by condensation of the corresponding 5-R-2-furaldehydes II with 3-amino-2-butenenitrile in acid medium. Relation between the structure and spectral properties (NMR, IR, UV, MS) is presented and the influence of substituents in position 5 of the furan ring on the conjugated 2-furylethylene system is discussed.
As far as I know, this compound(2689-65-8)Application In Synthesis of 5-Iodo-2-furaldehyde can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem