Synthesis and Mosquiticidal Activity of Novel Hydrazone Containing Pyrimidine Derivatives against Aedes aegypti
作者:Zhong-Hua Shen、Zhao-Hui Sun、James J. Becnel、Alden Estep、David E. Wedge、Cheng-Xia Tan、Jian-Quan Weng、Liang Han、Xing-Hai Liu
DOI:10.2174/1570180815666180102141640
日期:2018.7.16
Background: Aedes aegypti is the main mosquito vector for the transmission of several
serious diseases, including Japanese encephalitis, yellow fever, Zika, and dengue virus. Increasing
resistance to the limited number of public health chemicals requires the evaluation of new chemicals
as potential control products.
Methods: Pyrimidine-based compounds have shown some efficacy for agricultural uses and as
mosquitocidal products. In this paper, a series of novel pyrimidine acyl-hydrazone derivatives were
synthesized. Their structures were elucidated by 1H NMR and HRMS.
Results: Mosquitocidal activity was assessed against immature and adult Ae. aegypti to determine
efficacy and to guide further synthetic efforts. Bioassay using 1st instar Ae. aegypti produced about
33% mortality for compounds 4b and 4l but determined that most of the compounds exhibited
minimal larvicidal activity at 1ug/ul after 24 hours of exposure.
Conclusion: Compound 4m (N'-(4-bromobenzylidene)-2-((2-(diethylamino)-6-methylpyrimidin-4-
yl)oxy)acetohydrazide) was the most effective adulticide in this synthetic group and exhibited 40%
mortality at a concentration of 3.125µg/mosq.
背景:埃及伊蚊(Aedes aegypti)是多种严重疾病的主要传播媒介,包括日本脑炎、黄热病、寨卡和登革热病毒。对有限的公共卫生化学品的抵抗力不断增加,要求评估新化学品作为潜在控制产品。
方法:基于吡啶的化合物在农业用途和灭蚊产品中显示出一些效果。在本文中,合成了一系列新型的吡啶酰肼衍生物。通过1H NMR和高分辨率质谱(HRMS)确定了它们的结构。
结果:对幼虫和成虫埃及伊蚊的灭蚊活性进行了评估,以确定其效果并指导后续的合成工作。使用第一龄幼虫的生物测定显示,化合物4b和4l的死亡率约为33%,但发现在24小时暴露后,大部分化合物在1µg/µl浓度下表现出最小的灭幼虫活性。
结论:化合物4m(N'-(4-溴苯基亚胺)-2-((2-(二乙氨基)-6-甲基吡啶-4-基)氧)乙酰肼)是该合成组中最有效的成年蚊剂,在3.125µg/蚊子的浓度下表现出40%的死亡率。