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 One-Pot Synthesis of γ-Azidobutyronitriles and Their Intramolecular Cycloadditions, published in 2020-11-30, which mentions a compound: 1116-98-9, Name is tert-Butyl 2-cyanoacetate, Molecular C7H11NO2, Related Products of 1116-98-9.
Efficient gram-scale, one-pot approached to azidocyanobutyrates and their amidated or decarboxylated derivatives was developed, starting from com. available aldehydes and cyanoacetates. These techniques combine (1) Knoevenagel condensation, (2) Corey-Chaykovsky cyclopropanation and (3) nucleophilic ring opening of donor-acceptor cyclopropanes with the azide ion, as well as (4) Krapcho decarboxylation or (4′) amidation. The synthetic utility of the resulting γ-azidonitriles was demonstrated by their transformation into tetrazoles via intramol. (3+2)-cycloaddition A condition-dependent activation effect of the α-substituent was revealed in that case. Thermally activated azide-nitrile interaction did not differentiate the presence of an α-electron-withdrawing substituent in γ-azidonitriles, whereas the Lewis acid mediated (SnCl4or TiCl4) reaction proceeded much easier for azidocyanobutyrates. This allowed us to develop an efficient procedure for converting azidocyanobutyrates into the corresponding tetrazoles.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem