Quinoxaline derivative and herbicide for agricultural and horticultural purpose
专利汇可以提供Quinoxaline derivative and herbicide for agricultural and horticultural purpose专利检索，专利查询，专利分析的服务。并且NEW MATERIAL:Compounds of formula I [X is halogen, trifluoromethyl; R is -CH
2 COOR
1 (R
1 is lower alkyl), -R
2 -O-R
3 (R
2 is R
1 ; R
3 is H, R
2 ), formula II (R
4 is R
1 )].
EXAMPLE: The compound of formula III.
USE: Herbicide for agricultural and horticultural purposes: they show high herbicidal activity, even when used in soil treatment and foliar treatment, especially having excellent effect against true grasses, and cause no injury to cotton, soybean, radish. cabbage, eggplant and so on.
PREPARATION: The condensation reaction between 2-chloro-6-halogenquinoxaline of formula IV and 2-(4-hydroxyphenoxy)-propioic lower alkyl ester of formula V (R
1 is R) is effected in an inert solvent in the presence of an acid acceptor such as anhydrous potassium carbonate and the product is hydrolzyed to the corresponding free acid. Then, the acid is made into the acid chloride with a chlorinating reagent such as thionyl chloride and the chloride is made to react with an amine of NH
2 R by a usual method to give the compound of formula I.
COPYRIGHT: (C)1982,JPO&Japio，下面是Quinoxaline derivative and herbicide for agricultural and horticultural purpose专利的具体信息内容。
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