Discovery of 5-(5,5-Dimethylbutenolide-3-ethylidene)-2-amino-imidazolinone Derivatives as Fungicidal Agents
作者:Bo Tang、Mingyan Yang、Yu Zhao、Lingqing Kong、Weiwei Wang、Mingan Wang
DOI:10.3390/molecules200813740
日期:——
The novel fungicidal agents 5-(5,5-dimethylbutenolide-3-ethylidene)-2-amino-imidazolinone derivatives, were designed and synthesized in moderate to excellent yields in four steps by αa-hydroxyketone and diketene as raw materials and characterized by HR-ESI-MS and 1H-NMR. The preliminary bioassay showed that some of these compounds, such as 4a, 4e and 5g exhibit 94.9%, 92.8% and 81.4% inhibition rates against Sclerotinia scleotiorum at the concentration of 50 µg/mL, respectively. The EC50 values of compounds 4e and 4i were 4.14 and 3.27 µM against Alternaria Solani, and 5g had EC50 value of 3.23 µM against S. scleotiorum. Compounds 4d and 4g displayed 98.0% and 97.8% control of spore germination against Botrytis cinerea at the concentration of 100 µg/mL, respectively.
设计合成了新型杀菌剂5-(5,5-二甲基丁烯内酯-3-亚乙基)-2-氨基-咪唑啉酮衍生物,以αa-羟基酮和双烯酮为原料,通过四步反应以中等至优异的产率合成,并通过HR-ESI-MS和1H-NMR进行表征。初步生物测定结果表明:一些化合物(例如4a、4e和5g)对核盘菌的抑制率分别为94.9%、92.8%和81.4%,浓度为50 µg/mL;化合物4e和4i对早疫病菌的EC50值分别为4.14和3.27 μM;化合物5g对核盘菌的EC50值为3.23 μM;化合物4d和4g对灰霉病菌孢子萌发的控制率分别为98.0%和97.8%,浓度均为100 µg/mL。