延长脲桥的单取代嘧啶磺酰脲类除草剂的设计、合成、及除草活性

In order to find high efficient Sulfonylurea Herbicides,mono-substituted pyrimidine ring transformation were conducted based on the structure of Ethoxysulfuron.At the same time,the substituents on the phenyl ring were transformed or replaced the benzene ring with other conjugated heterocycles.21 compounds were designed and synthesized，Their chemical structures were established on the basis of corresponding 1 H NMR spectroscopy and HRMS，and their herbicidal activities were also assayed.?The results indicated that most of the compounds showed herbicidal activities ,?and the growth inhibitory activities on the Dicotyledons were better than Monocotyledons.