Twelvenovel α-(2,4-dichlorophenoxyacetoxy)arylmethylphosphonates were synthesized from the intermediate (α-hydroxyl)-α- arylmethylphosphonates and 2,4-dichlorophenoxyacetyl chloride. All compounds synthesized were identified by 1H NMR, IR and MS techniques. The crystal structure of the compound 4a was determined by X-ray single-crystal diffraction. Preliminary bioassay results showed that some of these compounds had better inhibiting effect against the roots of rape and barnyard grass. Inhibitory rates of compounds 4a-4l against the roots of rape and barnyard...
