SUBSTITUTED DIPHENYLETHER COMPOUNDS USEFUL AS HERBICIDES

摘要

Novel compounds which exhibit herbicidal activity in combating weeds have the formula: wherein X is a nitro group or a chlorine atom and R is: (a) A group ZR<3> where Z is oxygen or sulphur and R<3> is a substituted aliphatic or alicyclic radical; (b) A group -NR<1>R<2> where R<1> is hydrogen or an optionally substituted aliphatic, alicyclic or phenyl radical and R<2> is as R<1> but may additionally represent hydroxy or optionally substituted alkoxy, or where R<1> and R<2> may together constitute a heterocyclic ring, -NR<1>NR<2>; (c) A group -NR<1>S<2> where S<1> is preferably hydrogen and S<2> contains an optionally substituted carbonxylic ester group or a-CN or optionally N-substituted carboxy amide group; or (d) An optionally substituted phenoxy or phenylthio group or a sulpholanoxy group or an oxyimino group.