N-ACYL-N-PHENYLMALEAMIC ACID DERIVATIVE, PROCESS FOR PRODUCING THE SAME, AND HERBICIDE CONTAINING THE SAME AS ACTIVE INGREDIENT

摘要

An N-acyl-N-phenylmaleamic acid derivative represented by general formula (I), a process for producing the same, and a herbicide containing the same as the active ingredient, which is very useful as a herbicide because it can be widely applied to upland field, lowland, orchard, pasture, turf, forest and non-crop land, and is highly safe for crop. In formula (I), X and Y represent each independently hydrogen or halogen; R<1> represents hydrogen, halogen, lower alkyl, lower alkenyl, lower alkynyl, lower alkoxyalkyl or lower alkoxycarbonylalkyl; R<2> represents lower alkyl, halogenated lower alkyl or (un)substituted phenyl; R<3> represents hydrogen or lower alkyl; and R<4> represents hydroxy, lower alkoxy, lower alkenyloxy, lower alkynyloxy, lower alkoxy-alkoxy, benzyloxy or lower alkoxycarbonylalkoxy.