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 Divergent Pathways for Reactions of 3-Formylchromone with Cyclic Secondary Amines in Alcoholic Media, published in 2019, which mentions a compound: 56621-48-8, Name is 4-(Piperazin-1-yl)phenol, Molecular C10H14N2O, Quality Control of 4-(Piperazin-1-yl)phenol.
Reaction of 3-formylchromone with cyclic secondary amines in methanol results in (E)-chromanones I [X = CH, R = Ph; X = O, R = none; X = N, R = 4-MeC6H4, 2,6-Me2C6H3, 2-MeOC6H4, etc.] and II, while use of ethanol leads to (E)-bis(morpholino)chromanone III or enaminoketones as dihydropyran ring-opening products. The solubility of the formed products in alc. media is postulated to be a key factor that determines the reaction pathway.
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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem