Novel phenylpyridines were synthesized based on molecular modeling oriented design by superposition of herbicidal phenyl-uracils, -indazoles, and diphenylethers. Their preparation follows Suzuki-type coupling conditions of reactive 2-chloro-pyridines with appropriate 2,5-substituted
4-chloro-phenyl boronic acids. Depending on the nature of substituents in the pyridine, and in particular the phenyl group, a large number of derivatives are readily accessible. Besides open-chain phenylpyridines also anellated compounds, such as pyridine-substituted 2H-1,4-benzothiazin-3(4H)-one
or 3,4-dihydro-1H-quinolin-2-one, were prepared. Phenylpyridines act by inhibition of protoporphyrinogen-IX-oxidase. Their synthesis will be described in conjunction with structure–activity relationships. Phenylpyridines are highly active against many important broadleaf and grass weed
species under pre- and – in particular – post-emergent conditions.
基于分子建模定向设计,合成了新型苯基吡啶化合物,通过将除草剂苯基尿嘧啶、吲唑和二苯醚进行叠加。它们的制备遵循了将反应性2-氯吡啶与适当的2,5-取代的4-氯苯硼酸进行铜促进的Suzuki偶联条件。根据吡啶中取代基的性质,尤其是苯基,可以轻松获得大量衍生物。除了开链苯基吡啶,还制备了环化化合物,如吡啶取代的2H-1,4-苯并噻嗪-3(4H)-酮或3,4-二氢-1H-喹啉-2-酮。苯基吡啶通过抑制原卟啉原体IX氧化酶起作用。它们的合成将与结构活性关系一起描述。苯基吡啶在前期和后期条件下对许多重要的阔叶和禾本科杂草物种具有很高的活性。