Fungicidal and herbicidal compositions, certain cyanomethane and cyanoethene derivatives being active agents thereof, the preparation of these derivatives and methods for combating fungi and weeds

摘要

There are described pesticidal compositions comprising a compound of formula I,in which X represents a group-CN and Y a cation, or X and Y together form a group of formula II,in which R' and R², which may be the same or different, eacn represents nydrogen, alkyl, cycloalkyl or benzyl,R³ and R⁴, which may be the same or different, each represent hydrogen, alkyl, cycloalkyl, phenyl or phenyl substituted by one or more of halogen, alkyl, alkoxy, phenoxy, nitro, amino, -COOR⁹, -SO₃R⁸ or -CF₃, or R³ and R⁴ together form a 4, 5 or 6 membered metnylene chain which may be fused to a benzene ring, or which may be interrupted by an oxygen atom or by a group -NH-,R⁶ is -CN, -C(=NH)-NHR⁸, -CONR⁹R¹⁰, or -CQZR⁹,R⁸ represents alkyl or cycloalkyl,R⁹ and R¹⁰, which may be the same or different, each represent hydrogen, alkyl, phenyl or cycloalkyl, andQ and Z, which may be the same or different, each represent oxygen or sulphur,or a suitable derivative thereof,provided that when R⁶ is -COOC₂H₅ and R¹, R² and R³ are all hydrogen, then R⁴ is other than alkyl containing 3, 4 or 5 carbon atoms,together with an agriculturally acceptable adjuvant, diluent or carrier.There are also described methods for making and using the compounds. Certain of the compounds are new.