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Synthesis and Mosquiticidal Activity of Novel Hydrazone Containing Pyrimidine Derivatives against Aedes aegypti

[ Vol. 15 , Issue. 9 ]

Author(s):

Zhong-Hua Shen, Zhao-Hui Sun, James J. Becnel, Alden Estep, David E. Wedge*, Cheng-Xia Tan, Jian-Quan Weng, Liang Han and Xing-Hai Liu*   Pages 951 - 956 ( 6 )

Abstract:


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.

Keywords:

Mosquito activity, pyrimidine derivatives, synthesis, structure-activity relationship, hydrazone, Aedes aegypti.

Affiliation:

College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, USDA, ARS, Center for Medical, Agricultural and Veterinary Entomology, Gainesville, FL 32608, Navy Entomology Center of Excellence, CMAVE Detachment, Gainesville, FL 32608, USDA ARS, Natural Products Utilization Research Unit, University, MS 38677, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014

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