期刊
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
卷 80, 期 -, 页码 535-542出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2014.04.058
关键词
Antifungal activity; Phytopathogenic fungi; Benzofurazan derivatives
资金
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- National Basic Research Program of China [2010CB126100]
- Special Fund for Agro-scientific Research in the Public Interest [201303023]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, Jiangsu province 333 project
A series of benzofurazan derivatives were prepared and evaluated for their biological activities against four important phytopathogenic fungi, namely, Rhizoctonia solani, Sclerotinia sclerotiorum, Fusarium graminearum and Phytophthora capsici, using the mycelium growth inhibition method. The structures of these compounds were characterized by H-1 NMR, C-13 NMR, and HRMS. N-(3-chloro-4-fluorophenyl)-7-nitrobenzo[c][1,2,5]oxadiazol-4-amine (A3) displayed the maximum antifungal activity against R. solani (IC50 = 1.91 mu g/mL), which is close to that of the positive control Carbendazim (IC50 = 1.42 mu g/ mL). For other benzofurazan derivatives with nitro group at R-4 position (A series), 9 out of 30 compounds exhibited high antifungal effect against strain R. solani, with IC50 values less than 5 mu g/mL. Most of the derivatives with substituents at R-2 and R-3 positions (B series) displayed moderate growth inhibition against S. sclerotiorum (IC50 < 25 mu g/mL). Also, several benzofuran derivatives with nitro group at R-4 position and another conjugated aromatic ring at the R-1 position of the phenyl ring displayed high antifungal capability against strain R. solani. Compounds with substituents at R-2 and R-3 position had moderate efficacy against strain S. sclerotiorum. (C) 2014 Elsevier Masson SAS. All rights reserved.
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