Herbicidal phosphonates and preparation and use thereof, having the general formula
wherein Q is hydrogen or chlorine, X is oxygen or sulfur and R R, and R2 are various organic groups. The compounds can be made, e.g. by an number of processes involving introduction or abstraction of chlorine at the 2-position or by reaction of a phosphite with an appropriate haloacetate. The compounds can be formulated for agricultural use in conventional manner and exhibit selective as well as general herbicidal effects, showing both pre- and post-emergence activity.
除草
膦酸盐及其制备方法和用途,其通式为
其中 Q 是氢或
氯,X 是氧或
硫,R R 和 R2 是各种有机基团。这些化合物可以通过在 2 位引入或抽取
氯,或
亚磷酸与适当的卤代
乙酸酯反应等多种工艺制成。这些化合物可按常规方法配制成农用制剂,并具有选择性和一般性除草效果,同时具有萌发前和萌发后活性。