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Title
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Reaction of (chloro carbonyl) phenyl ketene with 5-amino
pyrazolones: Synthesis, characterization and theoretical studies of
7-hydroxy-6-phenyl-3-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine-
2,5(1H,4H)-dione derivatives
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Abstract
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New 7-hydroxy-6-phenyl-3-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine-2,5(1H,4H)-dione derivatives
were synthesized from the reaction of (chlorocarbonyl)phenyl ketene and 5-amino pyrazolones in high
to excellent yields and short reaction times. Structures of the new compounds were fully characterized
by their spectral data IR, 1H NMR, and 13C NMR and by the theoretical results. Density Functional Theory
(DFT) was used to optimize the structures, compute the energies and vibrational frequencies IR and 1H
NMR shielding tensors of the desired products. The theoretical results excellent are compared with the
experimental data
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