Aryl uracil compounds, preparation method thereof and pesticide composition

Abstract

The invention provides aryl uracil compounds shown in a formula I, wherein R1 and R2 are independently selected from hydrogen, amino, alkyl or halogenated alkyl, the carbon number of alkyl or halogenated alkyl is 1-4; X and Y are independently selected from hydrogen, halogen or cyano groups; Z is selected from oxygen atom or sulfur atom; when Z is the oxygen atom, R3 is C1-C8 alkyl substituted byfirst substituent groups, C2-C8 alkenyl substituted by the first substituent groups or C2-C8 alkynyl substituted by the first substituent groups; the first substituent groups comprise hydroxyl, nitryl, amino or alkyl amino; when Z is the sulfur atom, R3 is C1-C8 alkyl substituted by second substituent groups, C2-C8 alkenyl substituted by the second substituent groups or C2-C8 alkynyl substituted by the second substituent groups; the second substituent groups comprise hydroxyl, nitryl, amino, alkyl amino or alkoxycarbonyl. The aryl uracil compounds have high selectivity, wide weeding spectrum and good control effect on worst weed such as eleusine indica and the like. The invention also provides a preparation method of the aryl uracil compounds and pesticide composition.

Description

technical field [0001] The invention relates to the technical field of organic compounds, in particular to an aryl uracil compound, a preparation method thereof and a pesticide composition. Background technique [0002] Because weeds compete with crops for glory and fertilizer, weeds cause great losses to crop production every year. At present, the main method for controlling weeds is to spray herbicides. However, with the widespread application of herbicides (such as glyphosate), a large number of weeds have developed resistance, especially weeds such as goosegrass and barnyardgrass have developed into a dominant weed and a malignant weed. [0003] There are many kinds of herbicides on the market, which are generally used as non-selective herbicides, and generally have the characteristics of poor control effect, narrow weed removal range and high dosage, especially for malignant weeds such as goosegrass and barnyard grass The killing effect is poor. At the same time, as a...

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of herbicides on the market, which are generally used as non-selective herbicides, and generally have the characteristics of poor control effect, narrow weed removal range and high dosage, especially for malignant weeds such as goosegrass and barnyard grass The killing effect is poor

At the same time, as a selective herbicide, it often has adverse effects on the growth of crops, causing huge economic losses.

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