Abstract
A series of novel 1,5‐diaryl‐1H‐pyrazol‐3‐oxy derivatives containing oxyacetic acid or oxy(2‐thioxothiazolidin‐3‐yl)ethanone moieties were prepared from methyl 3‐arylacrylates via a serial of reactions included addition‐cyclization, oxidation, substitution, hydrolysis, and condensation. Their structures were confirmed by 1H‐NMR, 13C‐NMR, IR, and elemental analysis. In addition, the crystal structure of the compound 2‐(1,5‐diphenyl‐1H‐pyrazol‐3‐yloxy)‐1‐(2‐thioxothiazolidin‐3‐yl)ethanone was determined by single crystal X‐ray diffraction analysis. Bioassay results indicated that the compound 2‐(5‐(4‐chlorophenyl)‐1‐phenyl‐1H‐pyrazol‐3‐yloxy)‐1‐(2‐thioxo‐thiazolidin‐3‐yl)ethanone exhibited moderate inhibitory activity against Gibberella zeae at the dosage of 10 μg mL−1.
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