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 Cyanomethylation during the electroreduction of aromatic carbonyl compounds in acetonitrile, published in 1982-04-30, which mentions a compound: 17190-29-3, Name is 3-Hydroxy-3-phenylpropanenitrile, Molecular C9H9NO, Safety of 3-Hydroxy-3-phenylpropanenitrile.
Electrochem. reduction of PhCOR (R = H, Me, Ph) in MeCN gave PhC(OH)RCH2CN, PhCR:CHCN, PhCHRCH2CN, and PhCR(CH2CN)2 in addition to the normal reduction products, PhCHROH and [PhC(OH)R]2. The balance between the nitrile products and the normal reduction products depended on the c.d., temperature, and H2O concentration
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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics