Design, Synthesis, and Fungicidal Activity of Macrolactones and Macrolactams with a Sulfonamide Side Chain

文献类型： 外文期刊

第一作者： Wu, Peng

作者： Wu, Peng;Liang, Xiao-Mei;Dong, Yan-Hong;Zhang, Jian-Jun;Meng, Xiang-Qing;Wu, Jin-Ping;Chen, Fu-Heng;Wang, Dao-Quan;Yuan, Hui-Zu;Qi, Shu-Hua

作者机构：

关键词： Macrolactone;macrolactam;sulfonamide;synthesis;fungicidal activity;fungicide;pesticide;Rhizoctonia solani Kuhn

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

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年卷期：

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收录情况： SCI

摘要： Four series of novel macrolactones and macrolactams-12-alkylsulfonamido-1,15-pentadecanlactones (5), 12-alkyIsulfonamido-15-methyl-1,15-pentadecanlactones (6), 12-alkylsulfonamido-1,15-pentadecan-lactams (7), and N-(alkylsulfonamidoethyl)-1,12-dodecanlactams (8)-were designed and synthesized from readily available 2-nitracyclododecanone or cyclododecanone. Their structures were confirmed by ~1H NMR, IR, and elemental analysis. The bioassay showed that these compounds displayed fair to excellent fungicidal activity against Rhizoctonia solani Kuhn and have a gradual increase of fungicidal activity in the order of 6,7,8, and 5. Among them, compounds 5a, 5b, and 5c displayed excellent fungicidal activity against R. solani comparable with the commercial fungicide carbendazim. Above results illustrated that the rule on the relationship between the activity and hydrogen-bonding, namely the macrocyclic compounds with a hydrogen-bonding acceptor and a hydrogen-bonding donor on the ring and having a three methylenes distance between two polarizable groups have the best fungicidal activity against R. solani, has a general suitability to the macrocyclic compounds, and pesticide molecules may combine with a target enzyme by hydrogen-bonding. The facts, which compound 6 has a much lower fungicidal activity against R. solani than compound 5 but their difference in chemical structure is only that there is a methyl group on the C15 for compound 6 and none but hydrogen atom on the C15 for compound 5, indicated that a methyl group plays an inhibitory role to the fungicidal activity. It suggests that the existence of a methyl group with a great volume between two polarizable groups would interfere in the interaction of pesticide molecules and the target enzyme.

分类号： S13

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