A series of N-(2,4,5-trichlorophenyl)-2-Oxo- and 2-Hydroxycycloalkyl- sulfonamides (series II and III) were
designed and synthesized based on the leading compound chesulfamide (code name: CAUWL-2004-L-13). Their structures
were confirmed by 1H NMR, IR and elemental analysis. Compounds II and III showed excellent activities against
the Botrytis cinerea both in vitro and in vivo. Mycelia growth and conidial germination assays exhibited that EC50 of
compound IId were 0.64 μg mL-1 and 0.34 μg mL-1 respectively. For in vivo control of B. cinerea in cucumber seedlings,
compounds IIb and IId showed better control effect than the commercial fungicides procymidone and pyrimethanil. In
addition, these new compounds had broader fungicidal spectra than chlorothalonil. The fungicidal activity was affected
obviously by the size of cycloalkane. All the compounds with six-, seven-, and eight-membered ring showed high fungicidal
activities.
以主要化合物螯磺酰胺(代号:CAUW
L-2004-L-13)为基础,设计并合成了一系列 N-(2,4,5-
三氯苯基)-2-氧代和 2-羟基环烷基磺酰胺(系列 II 和 III)。通过 1H NMR、IR 和元素分析确认了它们的结构。化合物 II 和 III 在体外和体内都显示出对灰霉病菌的卓越活性。菌丝生长和分生孢子萌发试验表明,化合物 IId 的
EC50 分别为 0.64 μg mL-1 和 0.34 μg mL-1。在黄瓜幼苗中对
银环孢菌的体内控制方面,化合物 IIb 和 IId 比商用杀菌剂丙
嘧菌酯和
嘧菌酯表现出更好的控制效果。此外,与
百菌清相比,这些新化合物的杀菌谱更广。环
烷烃的大小对杀菌活性有明显的影响。所有具有六元环、七元环和八元环的化合物都表现出较高的杀菌活性。