A number of chromone derivatives containing sulfonamide structure were designed and synthesized. Firstly, the target compounds were evaluated for anti-TSWV activities in vivo by the half-leaf method. We found that most of the compounds had good anti-TSWV activities. Among them, compound 12B had excellent anti-TSWV inactivating activity with an EC₅₀ of 80.5 μg/mL, which was significantly better than xiangcaoliusuobingmi (765.7 μg/mL). Secondly, TSWV nucleocapsid protein (N) was expressed and purified, and the affinity between the compounds and TSWV N was tested by microscale thermophoresis (MST). Compound 12B had a good affinity for TSWV N with a K_d value of 5.02 μM, which was superior to xiangcaoliusuobingmi (29.83 μM). Finally, in order to study the mode of interaction between the compound 12B and TSWV N, we carried out molecular docking. The results indicated that compound 12B might inactivate the virus by destroying the TSWV N oligomer structure. These results lay a solid foundation for the further discovery of chromone derivatives containing sulfonamide structure with high anti-TSWV activities.

设计合成了多种含有磺酰胺结构的色酮衍生物。首先，通过半叶法评估目标化合物的体内抗TSWV活性。我们发现大多数化合物具有良好的抗 TSWV 活性。其中，化合物12B具有优异的抗TSWV灭活活性，EC ₅₀为80.5  μg /mL，明显优于香草六索冰米(765.7  μg /mL)。其次，表达和纯化TSWV核衣壳蛋白(N)，并通过微量热泳(MST)测试化合物与TSWV N的亲和力。化合物12B对 TSWV N 具有良好的亲和力，K _d值为 5.02 μ M，优于香草柳索冰米（29.83  μ M）。最后，为了研究化合物12B与TSWV N之间的相互作用方式，我们进行了分子对接。结果表明，化合物12B可能通过破坏TSWV N寡聚体结构来灭活病毒。这些结果为进一步发现具有高抗TSWV活性的含磺酰胺结构的色酮衍生物奠定了坚实的基础。