Abstract
New derivatives of acylheterylureas were synthesized by reactions of acylisocyanates with 4-amino-2,3-dimethyl-l-phenylpyrazol-5-one. The structures of the compounds obtained have been established by IR and1H NMR spectroscopy.N-Benzoyl-N′-[4-(1-phenyl-2,3-dimethylpyrazol-5-one)]urea has been studied by X-ray structural analysis. It was found that the molecule adopts ananti-syn conformation stabilized by an intermolecular hydrogen bond. In the crystal, molecules are linked in centrosymmetric dimers via intermolecular hydrogen bonds.
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Translated fromIzvestiva Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 419–422,. February, 1996.
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Fedotova, N.R., Litvinov, I.A. & Kataeva, O.N. Synthesis of newN-acylantipyrylureas and the crystal structure ofN-benzoyl-N′-[4-(2,3-dimethyl-1-phenylpyrazol-5-one)]urea. Russ Chem Bull 45, 403–406 (1996). https://doi.org/10.1007/BF01433981
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DOI: https://doi.org/10.1007/BF01433981