Natural product-based semisynthesis and biological evaluation of thiol/amino-Michael adducts of xanthatin derived from Xanthium strumarium as potential pesticidal agents
作者:Xiao-yan Zhi、Ling-yun Jiang、Ting Li、Li-li Song、Li-juan Wu、Hui Cao、Chun Yang
DOI:10.1016/j.bioorg.2020.103696
日期:2020.4
Xanthatin, a natural sesquiterpene lactone, occurs as one of the major constituents of Xanthium plants (Compositae) and exhibits many important biological properties. To discover natural products-based pesticides, forty-nine Michael-type thiol/amino adducts of xanthatin were synthesized and characterized, while their pesticidal activities were investigated. Among them, compounds 2c, 2h, 2i, and 2t
Xanthatin是天然的倍半萜烯内酯,是Xanthium植物(菊科)的主要成分之一,具有许多重要的生物学特性。为了发现基于天然产物的农药,合成并表征了49种黄嘌呤的迈克尔型硫醇/氨基加合物,并研究了其杀虫活性。其中,化合物2c,2h,2i和2t表现出对灰葡萄孢的更强的抗真菌活性(IC 50分别为0.96、0.38、6.33和7.21 µg / mL),高于黄嘌呤和两种市售杀菌剂。化合物2t和2u对所有测试的植物病原真菌均表现出广谱和优异的抗真菌作用,而其IC 50值则在7.21至75.88 µg / mL之间。化合物2a,2f,2l,2m,2v,7c,7e,7h,7i和7j显示出对小菜蛾的适度杀幼虫活性。此外,使用LC 50,化合物2b,7g和7h表现出对小菜蛾的显着杀卵活性。分别为14.04、10.00和11.95 mg / L。这些发现表明,在黄嘌呤的C-13位附加的硫醇/氨基可以改