Design, synthesis and bioactivity of novel ALS enzyme inhibitors (II)——Molecular mechanics, quantum chemistry and structure-activity relationship studies on the herbicidal heterocyclic sulfonamide

In view of quantum pharmacology, the structure-activity relationships of different kinds of fused heterocydic sulfonamides with the same mode of action were first investigated using molecular mechanics, quantum chemistry and discriminatory analysis. It has been found that the process of the interaction of the fused heterocydic sulfonamide with ALS enzyme involves the electropositive region of the sulfonyl bridge chain and the electronegative region of the heterocydic moiety. The herbicidal activity is related to the potency of electric charge translocation of the related regions.     

以ALS酶为靶标的新型除草剂的分子设计、合成及生物活性研究——Ⅱ.稠杂磺酰胺类除草剂的分子力学、量子化学及构效关系研究

从量子药理学的角度,对不同类型的、具有相同作用机制的稠杂磺酰胺除草剂进行分子力学、量子化学及构效关系研究.发现稠杂磺酰胺在与ALS酶作用时可能涉及两个电性部位,桥链正电中心区域,杂环负电中心区域,化合物的除草活性与其电荷转移能力有关.