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 cyclic process on the recovery of copper from metal-sludge by solvent extraction, published in 1979-01-31, which mentions a compound: 18362-64-6, Name is 2,6-Dimethyl-3,5-heptanedione, Molecular C9H16O2, SDS of cas: 18362-64-6.
Cu in sludge was leached with NH3 solution, and the leach solution was extracted with di-isobutyryl methane [18362-64-6] in toluene. The Cu in the organic solvent was stripped with H2SO4, and recovered by electrolysis of the saturated CuSO4 solution The leach solution, the extracting reagent, and H2SO4 were recycled. Recovery of Cu from sludge was 90% and recovery from leach solution was 99%.
Compounds in my other articles are similar to this one(2,6-Dimethyl-3,5-heptanedione)SDS of cas: 18362-64-6, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica