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• W2912695402 abstract "7‐Amino‐3‐phenylazo‐2‐methyl‐4 H ‐pyrazolo[1,5‐ a ]pyrimidine‐5‐one ( 3 ) was synthesized by the reaction of 5‐amino‐3‐methyl‐4‐phenylazo‐1 H ‐pyrazole and 2‐aminobenzothiazole with ethyl cyanoacetate in acetic acid at 150°C. Four novel heterocyclic azo disperse dyes were obtained by the coupling of heterocyclic amines‐based diazonium chloride with compound 3 . They were purified and characterized by elemental analysis, FTIR, and 1 H NMR. Furthermore, solvatochromic behaviors of related dyes were studied in detail by using ultraviolet–visible absorption spectrometer. The experimental data were supported by density functional theory using b3lyp/cc‐pvtz level calculations, and a detailed analysis of predicted tautomeric structures was made." @default.
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• W2912695402 date "2019-01-21" @default.
• W2912695402 modified "2023-10-14" @default.
• W2912695402 title "Synthesis, Characterization, and Theoretical Calculation of New Azo Dyes Derived from [1,5‐<i>a</i>]Pyrimidine‐5‐one Having Solvatochromic Properties" @default.
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• W2912695402 doi "https://doi.org/10.1002/jhet.3497" @default.
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