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Diphenyl ether derivative and herbicide comprising it

阅读:106发布:2020-11-08

专利汇可以提供Diphenyl ether derivative and herbicide comprising it专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A diphenyl ether derivative shown by the formula (X is H or halogen; Y is halogen or CF
3 ; R
1 is H or CH
3 ; R
2 is 2-furyl, 2-thienyl, or 2- pyridyl).
EXAMPLE: 2,4-Dichlorophenyl-3-furfuryloxy-4-nitrophenyl ether.
USE: A selective herbicide. Having stronger activity in a small amount against very harmful weeds, e.g., Echinochloa oryzicola Vasing in a paddy field, large crab- grass and yellow foxtail grass in a dry field with extremely smaller phytotoxicity to a paddy-rice plant, soybean, and other useful plants than 2,4-dichlorophenyl-3- methoxy-4-nitrophenyl ether or 2,4-dichlorophenyl-4-nitrophenyl ether.
PROCESS: For example, a concentrated aqueous solution of NaOH is added to a solution of furfuryl alcohol in dioxane, which is reacted with a solution of 2,4- bis(2,4-dichlorophenoxy)nitrobenzene in dioxane to give a compound shown by the formula.
COPYRIGHT: (C)1981,JPO&Japio,下面是Diphenyl ether derivative and herbicide comprising it专利的具体信息内容。

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