GB728994A - Improvements in or relating to substituted succinimides - Google Patents

Abstract

The invention comprises substituted succinimides of the general formula <FORM:0728994/IV (b)/1> wherein Ar is an aryl group. The compounds, which are fungicides, are prepared by reacting a ,a -dichlorosuccinic anhydride with an N-arylamine and effecting an inner condensation of the resulting N-aryl-a ,a -dichlorosuccinamic acid by reaction with an inorganic acid halide, e.g. thionyl chloride, the sulphur chlorides, phosphorus trichloride and pentachloride and the oxychlorides. The examples describe the preparation of compounds in which the aryl group is phenyl, p-chlorophenyl, 2,5-dichlorophenyl, p-tolyl, p-diphenyl and p-nitrophenyl; and a large number of other compounds is listed in which phenyl and other aryl groups contain hydrocarbon, halogen and nitrogen-, oxygen-and sulphur-containing substituents.ALSO:A fungicidal composition comprises a carrier and an N-aryla , a 1 - dichlorosuccinimide. Examples of such compounds are N-phenyl-, N-p-chlorophenyl-, N-2,5-dichloro-phenyl-, N-p-tolyl-, N-p-diphenyl- and p-nitrophenyl-a , a 1- dichlorosuccinimides but a large number of other compounds are listed in which phenyl and other aryl groups, particularly naphthyl, contain hydrocarbon, halogen and nitrogen-, oxygen- and sulphur-containing substituents. The composition may be in the form of a water suspension which preferably include surface-active active agents such as salts of alkyl sulphates and alkyl and aralkyl sulphonates and alkylamide sulphonates, alkylaryl polyether alcohols, polyhydric alcohol-fatty acid esters, and the ethylene oxide addition products of such esters and of long chain mercaptans. The fungicides may also be applied in solution in an organic solvent, e.g. benzene, xylene, toluene, acetone, methylethyl ketone, cyclohexanone, carbon tetrachloride, trichloro- and perchloroethylene, kerosene, ethyl, butyl and amyl acetates, ethanol, isopropanol, amyl alcohols, and the monoalkyl ethers of ethylene-and diethylene glycol. The carrier may also consist of solid diluents such as talc, cellulosic powders, and clays such as Fullers earth, diatomaceous earth, Pyrophillite, Bentonite, Montmorillonite and Attaclay. Oil-in-water emulsions may be prepared by dispersing a solution of the fungicide in a water-insoluble solvent in water containing a wetting agent. A combination of the above methods of application may also be used, e.g. mixing a wetting-agent with a dust formulation and suspending in an aqueous or other liquid medium. The compositions may also include other additives, e.g. vegetable oils, gums and other adhesives, humecants, fertilisers, herbicides and other fungicides and biocides. The fungicides may be used at concentrations of from 0.1 to 50,000 parts per million and are non-toxic to plants. Their effect on Tomato Blight is described.