Design, synthesis, crystal structure, and in vitro antibacterial activities of sulfonamide derivatives bearing the 4-aminoquinazoline moiety
作者:Suran Wan、Nan Wu、Ya Yan、Yehui Yang、Guangmin Tian、Lian An、Xiaoping Bao
DOI:10.1007/s11030-022-10484-8
日期:——
moiety were designed and synthesized, and their structures were fully characterized by 1H NMR, 13C NMR, and HRMS techniques. Among them, the structures of compounds 5A10 and 5B11 were further confirmed through X-ray single-crystal diffraction analyses. The bioassay results indicated that some of the target compounds displayed higher inhibition activities in vitro against the tested phytopathogenic bacteria
总共设计并合成了66个带有4-氨基喹唑啉部分的磺酰胺衍生物,并通过1 H NMR、13 C NMR和HRMS技术充分表征了它们的结构。其中,化合物5A10和5B11的结构通过X射线单晶衍射分析得到进一步证实。生物测定结果表明,部分目标化合物对受试植物病原菌表现出较高的体外抑制活性。例如,化合物5A26表现出强抗米黄单胞菌 pv 。oryzicola ( Xoc ) 功效 EC 50(半最大有效浓度)值为 30.6 μg/mL,比对照剂双噻唑 (BMT) 活性高两倍多。此外,化合物5B14对植物病原菌Xanthomonas axonopodis pv.具有良好的抗菌作用。柠檬酸( Xac ) 的 EC 50 = 34.5 μg/mL,显着优于对照剂 BMT (71.5 μg/mL)。抗Xoc机理研究表明,化合物5A26通过增加细菌膜的通透性、降低胞外多糖的含量、引发细菌细胞的形态变化来发挥抗菌功效。