Phytotoxic Activity of N-Phenylsulfonylbenzamides

Abstract

Many N-phenylsulfonylbenzamides were synthesized, and their biological activities were tested. Some of these compounds showed a high phytotoxic activity against barnyardgrass with no significant effect on rice plants at their germination stage. In particular, both N-allyl-2-chloro-N-phenylsulfonylbenzamide and N-allyl-2, 4-dichloro-N-phenylsulfonylbenzamide were the most active and a herbicidal test of these two compounds was done in paddy field conditions.