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Yan, Zhongzhong; Liu, Aiping; Huang, Mingzhi; Liu, Minhua; Pei, Hui; Huang, Lu; Yi, Haibo; Liu, Weidong; Hu, Aixi
European journal of medicinal chemistry, 04/2018, Letnik: 149Journal Article
Pyrazolecarboxamide fungicides are one of the most important classes of agricultural fungicides, which belong to succinodehydrogenase inhibitors (SDHIS). To discover new pyrazolecarboxamide analogues with broad spectrum and high activity, a class of new compounds of pyrazole carboxamide derivatives containing thiazole or oxazole ring were designed by scaffold hopping and bioisosterism, and 36 pyrazole carboxamide derivatives with antifungal activity were synthesized. Those compounds were evaluated against five phytopathogenic fungi, Gibberella zeae, Phytophythora capsici, Sclerotonia sclerotiorum, Erysiphe graminis and Puccinia sorghi. The results indicated that most of the compounds displayed good fungicidal activities, especially against E. graminis. Theoretical calculations were carried out at the B3LYP/6-31G (d, p) level and the full geometry optimization was carried out using the 6-31G (d, p) basis set, and the frontier orbital energy, atomic net charges, molecular docking were discussed, and the structure-activity relationships were also studied. Display omitted •The introduction of thiazole or oxazole ring makes our target compounds have good antifungal activities.•The change of three-dimensional structure is necessary for the transformation from insecticidal activity to antifungal activity.•DFT study and molecular docking verify the interaction between small molecule and protein.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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