p-Hydroxyphenylpyruvate dioxygenase (HPPD) is one of the most important targets for herbicide discovery. In this work, a series of benzothiadiazole-containing pyrazoles were designed as novel HPPD inhibitors by scaffold hopping strategy. Their biological activity was evaluated at both enzyme as well as crops level. The structure-activity relationships were also analyzed. The results showed that most of the target compounds have potent inhibitory activity against recombinant HPPD and some of them display good herbicidal activity, especially compounds 6d and 6j, which exhibited promising efficac...
