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 Synthesis of 5-benzyl-4,5,6,7-tetrahydropyrazolo [1,5-a] piperazine, published in 2013-08-28, which mentions a compound: 948552-36-1, Name is 1H-Pyrazole-5-carbaldehyde, Molecular C4H4N2O, Safety of 1H-Pyrazole-5-carbaldehyde.
A new compound of 5-benzyl-4,5,6,7-tetrahydropyrazolo [1,5-a] piperazine was synthesized from propynol and diazomethane in a sequence of condensation, oxidation and reductive amination, chlorization and cyclization. The structure of the target compound was confirmed by 1H NMR and MS anal.
Here is a brief introduction to this compound(948552-36-1)Safety of 1H-Pyrazole-5-carbaldehyde, if you want to know about other compounds related to this compound(948552-36-1), you can read my other articles.