Abstract
Study of safeners has been seldom reported in literature. In this work, a series of novel acylsulfamoylbenzamide analogues was designed and synthesized with newly developed safener cyprosulfamide (CSA) as the leading compound. The activity assay against the herbicide thiencarbazone-methyl (TCM) on maize revealed that fifteen compounds showed better protective effect than CSA on the fresh weight of aerial parts, twelve compounds exhibited better activity on the dry weight of aerial parts. Remarkably, two compounds (6Ih, 7II) had protective effect on the four aspects of TCM treated maize. Further antifungal assay showed their excellent activity against Physollospora piricola. The structure–activity relationships of CSA analogues as safeners and fungicides were discussed and it might be valuable for further molecular modification of new CSA analogues.
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