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 Regioselective Radical Borylation of α,β-Unsaturated Esters and Related Compounds by Visible Light Irradiation with an Organic Photocatalyst, published in 2021-06-04, which mentions a compound: 3393-45-1, Name is 5,6-Dihydro-2H-pyran-2-one, Molecular C5H6O2, Reference of 5,6-Dihydro-2H-pyran-2-one.
Radical hydroboration reactions have only recently been reported and are still rare. Here the authors describe a photoredox radical hydroboration of α,β-unsaturated esters, amides, ketones, and nitriles with NHC-boranes that uses only an organocatalyst and visible light. The conditions are mild, the substrate scope is broad, and the α/β regioselectivity is high. The reaction requires only the organocatalyst; there is no costly metal, and there are no other additives (base, cocatalyst, initiator).
This literature about this compound(3393-45-1)Reference of 5,6-Dihydro-2H-pyran-2-onehas given us a lot of inspiration, and I hope that the research on this compound(5,6-Dihydro-2H-pyran-2-one) can be further advanced. Maybe we can get more compounds in a similar way.
Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI