Nouveaux composés organiques du phosphore, leur procédé de préparation et leur utilisation comme insecticides

摘要

The invention comprises compounds of the general formula in which R and R1 and alkyl, cycloalkyl, aralkyl, aryl or heterocyclic residues which may be substituted and which alkyl residue may be interrupted by at least one oxygen atom, R2 is a hydrogen atom or an alkyl or acyl residue containing at most 4 carbon atoms, R3 is a hydrogen atom or an alkyl residue containing at most 4 carbon atoms, R4 is the group -CH2-, -CH2-CH2- or -CH(R5)- in which R5 is an alkyl residue containing at most 4 carbon atoms and X is an oxygen or sulphur atom. They may be obtained by reacting a compound of formula (RO)(R1O)P(X)SMe in which Me is a salt-forming cation, especially in alkali metal, with a compound of the formula Hal.R4.CON(OR2) (R3) in which Hal is a halogen atom, e.g. Br or Cl. The reaction may be effected at ordinary or elevated temperature, e.g. within the range of 0 DEG to 120 DEG C. and an inert solvent, e.g. an alcohol or ketone, may be present, or water may be added. If desired the reaction may be carried out in an atmosphere of an inert gas, e.g. nitrogen, and/or under reduced pressure. Several examples are given and the products have pesticidal properties (see Group VI).ALSO:A pesticidal composition comprises, in admixture with a liquid, gaseous, or solid diluent, an organo-phosphorus compound of the general formula in which R and R1 each represent an alkyl, cycloalkyl, aralkyl, aryl or heterocyclic residue which may be substituted and which alkyl residue may be interrupted by at least one oxygen atom, R2 is a hydrogen atom or an alkyl or acyl residue containing at most 4 carbon atoms, R3 is a hydrogen atom or an alkyl residue containing at most 4 carbon atoms, R4 represents the group -CH2-, -CH2, -CH2-, or in which R5 is an alkyl residue containing at most 4 carbon atoms, and X is an oxygen or a sulphur atom. The composition may be in the form of a spraying or dusting preparation and is suitably in the form of a solution, suspension, or emulsion which may be prepared with wetting agents, adhesives, water and/or an organic solvent, e.g. alcohol, acetone, methyl-cyclohexanol, benzene, kerosene, petroleum, or petroleum fractions. Besides the usual inert diluents the composition may contain sulphite cellulose waste liquor or cellulose derivatives. The active ingredient may also be used in vapour form as a fumigant. Other insecticides and/or fungicides may also be present.