Sulfonamide derivative, process for preparing the same and herbicide

Abstract

Disclosed are a sulfonamide compound represented by the following formula (I): ##STR1## wherein Y represents a lower akyl group, a lower alkenyl group, a lower alkynyl group, a halo-lower alkyl group, a cyano-lower alkyl group or --C(CH.sub.3).sub.2 (OR.sup.1) where R.sup.1 represents a lower akyl group, a lower alkenyl group, a lower alkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group; Q represents a substituted or unsubstituted pyridyl group or --NR.sup.2 R.sup.3 where R.sup.2 represents a hydrogen atom, a lower alkyl group, a lower alkoxy group; and R.sup.3 represents a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a phenyl group or a benzyl group; or R.sup.2 and R.sup.3 may be combined to form a cycloamino group; X represents an oxygen atom or a sulfur atom; and Z represents a nitrogen atom or --CH.dbd. group; processes for preparing the same and a herbicide containing the same as an active ingredient(s).