Sulfonylurea compound, preparation method thereof and use in preparing herbicide

Abstract

The invention relates to a kind of sulfonylurea compound and its use in preparing herbicides. The compound has good control effects on rape, retroflexus amaranth, Echinochloa crusgalli(L.)Beauv, common crabgrass herb, eragrostis curvula, barnyard grass, bromus inermis, Eleusine indica, Setaria viridis, Puccinellia distans, Elymus dahuricus, Flaveria bidentis, Ixeris sonchifolia, purslane, morningglory, Abutilon theophrasti, alfalfa, water chestnut, Chenopodium album Linn, dandelion and Polygonum hydropiper, at a dose of 0.5-1g / mu. At a dose of 1g / mu, when stem and leaf treatment or soil treatment is performed, the herbicide has reasonable biological safety for soybean and peanut. These compounds can be used as herbicides in soybean and peanut fields, or broad-spectrum herbicides in non-crop fields such as forest farms or wasteland. The chemical structural formula of the sulfonylurea compound is as follows.

Description

technical field

[0001] The invention belongs to the technical field of agrochemicals, and relates to a class of sulfonylurea compounds, a preparation method thereof and an application in the preparation of herbicides, in particular to an application in the preparation of herbicides for preventing and eliminating malignant weed barnyardgrass.

[0002] technical background

[0003] Acetolactate synthase (acetohydroxyacid synthase, AHAS, E.C.2.2.1.6) is the first key enzyme that plays a catalytic role in the biosynthesis pathway of leucine, valine and isoleucine. This biochemical process only exists in plants And in microorganisms, animals themselves cannot synthesize these branched-chain amino acids and need to obtain them from food to maintain life. Therefore, inhibitors targeting AHAS have natural biosafety for humans, animals and other mammals (McCourt JA, etal.Amino Acids, 2006, 31(2), 173-210).

[0004] The crystal structure of AHAS-herbicide complexes from the model plan...

Images