Herbicidal compositions comprising containing sulfonanilides of the formula (I)wherein R1represents hydrogen, fluorine, chlorine, C1-4alkyl, C1-4alkoxy, C3-6cycloalkyl- C1-4alkyloxy or C1-4haloalkoxy, R2represents hydrogen, fluorine or chlorine, R3represents hydrogen or fluorine, R4represents hydrogen or C1-4alkyl which may be optionally C1-4alkoxy-substituted, C3-6alkenyl or C3-6alkynyl, R5represents hydrogen, R6represents hydroxy, fluorine or chlorine, or R5and R6may form, together with the carbon to which they are bonded, C=O, and X represents CH or N, provided that the following cases are excluded: (i) R1represents hydrogen, fluorine or chlorine, R2represents hydrogen, R3represents hydrogen, R4represents hydrogen, R5represents hydrogen, and R6represents hydroxy, (ii) R1represents hydrogen, fluorine or chlorine, R2represents hydrogen, R3represents hydrogen, R4represents hydrogen, and R5and R6form C=O together with the carbon to which they are bonded, (iii) R1represents C1-4alkyl, R2represents hydrogen, R3represents hydrogen, R4represents hydrogen, R5represents hydrogen, R6represents hydroxy, and X represents CH, or (iv) R1represents C1-4alkyl, R2represents hydrogen, R3represents hydrogen, R4represents hydrogen, R5and R6form C=O together with the carbon to which they are bonded, and X represents CH, and new compounds being embraced by the formula (I).本發明係關於含有式(I)之磺醯苯胺類之除草組成物其中R1代表氫、氟、氯、C1-4烷基、C1-4烷氧基、C3-6環烷基-C1-4烷氧基或C1-4鹵烷氧基,R2代表氫、氟或氯,R3代表氫或氟,R4代表氫、可隨意地經C1-4烷氧基取代之C1-4烷基、C3-6烯基或C3-6炔基,R5代表氫,R6代表羥基、氟或氯,或R5及R6可與彼等鍵結之碳一起形成C=O,及X代表CH或N,其先決條件係排除下列情況:(i)R1代表氫、氟或氯,R2代表氫,R3代表氫,R4代表氫,R5代表氫及R6代表羥基,(ii)R1代表氫、氟或氯,R2代表氫,R3代表氫,R4代表氫,以及R5及R6與彼等鍵結之碳一起形成C=O,(iii)R1代表C1-4烷基,R2代表氫,R3代表氫,R4代表氫,R5代表氫,R6代表羥基及X代表CH,或(iv)R1代表C1-4烷基,R2代表氫,R3代表氫,R4代表氫,R5及R6與彼等鍵結之碳一起形成C=O及X代表CH;以及以式(I)所包含之新穎化合物。
