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 A simple preparative synthesis of epoxy[1,3]oxazino(or oxazolo)[2,3-a]isoindoles and their thia analogues via IMDAF, published in 2010-09-01, which mentions a compound: 2689-65-8, Name is 5-Iodo-2-furaldehyde, Molecular C5H3IO2, COA of Formula: C5H3IO2.
Azomethines, easily prepared from 5-(R)-furfurals and 1,3- or 1,2-amino alcs. (aminothiols), react under mild conditions with maleic anhydride affording 8,10a-epoxy[1,3]oxa(thia)zino[2,3-a]isoindole-7- and 7,9a-epoxy[1,3]oxa(thia)zolo[2,3-a]isoindole-6-carboxylic acids. The reaction proceeds through initial N-acylation with subsequent intramol. exo-Diels-Alder cycloaddition and stereoselectively leads to the exo adducts. The ‘one-pot’ synthetic protocol is also presented.
As far as I know, this compound(2689-65-8)COA of Formula: C5H3IO2 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