SUBSTITUTED PHENYLUREA DERIVATIVE AND HERBICIDE CONTAINING SAID DERIVATIVE AS ACTIVE COMPONENT

摘要

NEW MATERIAL:The N'-aryl-N-methylurea derivative of formula I (A is alkylene; R is methyl or methoxy). EXAMPLE:1-[4-(2,3-Dihydro-2,2-dimethyl-5-benzofuranylmethyloxy)p-henyl ]-3- methoxy-3-methylurea. USE:A herbicide exhibiting high herbicidal activity in plowed land and paddy field and giving little influence upon crops. Useful for the control of smooth pigweed, knotweed, Indian mallow, toothcup, monochoria, etc. PREPARATION:The compound of formula I can be produced by reacting a compound of formula II with a compound of formula III (Z is halogen) in the presence of a base (e.g. triethylamine) in a solvent (e.g. acetone) at 0-150 deg.C.