Synthesis and herbicidal activity of novel sulfonylureas containing 1,2,4-triazolinone moiety

Abstract

A series of new sulfonylureas incorporating 1,2,4-triazolinone moiety was synthesized, which were further bio-assayed for the herbicidal activity against four herbs, representative of monocotyledons and dicotyledons. Some of them exhibited high potency to inhibit the growth of dicotyledons(Bassica napus and Amaranthus retrofle-xus) in the pot experiment. Compounds 9a and 9b also displayed an excellent herbicidal activity against Bassica napus at a concentration of 15 g/hectare, which were comparable with commercial triasulfuron.

Keywords

Sulfonylurea herbicide / Acetohydroxyacid synthetase(AHAS) / 1,2,4-Triazolinone derivative / Protox / Herbicidal activity

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