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 Iterative Arylation of Amino Acids and Aliphatic Amines via δ-C(sp3)-H Activation: Experimental and Computational Exploration, published in 2019, which mentions a compound: 2689-65-8, Name is 5-Iodo-2-furaldehyde, Molecular C5H3IO2, Formula: C5H3IO2.
Directed C-H functionalization has been realized as a complementary tool to the traditional approaches for a straightforward access of non-proteinogenic amino acids; albeit such a process is restricted mostly up to the γ-position. In the present work, we demonstrate the diverse (hetero)arylation of amino acids and analogous aliphatic amines selectively at the remote δ-position by tuning the reactivity controlled by ligands. An organopalladium δ-C(sp3)-H activated intermediate has been isolated and crystallog. characterized. Mechanistic investigations carried out exptl. in conjunction with computational studies shed light on the difference in the mechanistic picture depending on the substrate structure.
Compounds in my other articles are similar to this one(5-Iodo-2-furaldehyde)Formula: C5H3IO2, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem