Abstract:
The invention comprises organic phosphorus compounds of the general formula wherein R1 and R2, which may be the same or different represent C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylmercapto, C1-C4 alkylamino, di-C1-C4 alkylamine, cyano-substituted di-C1-C4-alkylamino, phenyl, C1-C4 alkylmercapto-substituted phenoxy, phenylamino, or morpholyl radicals or a further group or R2 and R2 together form an alkylene-dioxy group; R3 and R4, which may be the same or different, represent hydrogen atoms or C1-C4 alkyl, cyano-substituted C1-C4 alkyl, or phenyl radicals or the group represents a morpholyl or piperidyl radical; A represents the residue of carbonic, sulphurous, phenyldithiophosphonic, C1-C4 alkoxy-substituted phenyldithiophosphonic, phthalic, halogen-substituted phthalic, or maleic acid; and X represents an electron pair or a sulphur atom. These compounds may be produced by reacting an appropriate organic compound of trivalent phosphorus containing at least one phosphorus-nitrogen band with an appropriate organic or triorganic anhydride to give a compound in which X is an electron pair and, if desired, reacting said compound with elementary sulphur or a sulphur-yielding agent to give a compound in which X is a sulphur atom. The compounds of the invention exhibit pesticidal activity (see Division A5).ALSO:Pesticidal compositions contain an organophosphorus compound of the general formula wherein R1 and R2, which may be the same or different, represent C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylmercapto, C1-C4 alkylamino, di-C1-C4-alkylamino, cyano-substituted-di-C1-C4 alkylamino, phenyl, C1-C4 alkylmercapto-substituted phenoxy, phenylamino, or morpholyl radicals or a further group or R1 and R2 together form an alkylenedioxy group; R3 and R4, which may be the same or different, represent hydrogen atoms or C1-C4 alkyl, cyano-substituted C1-C4 alkyl, or phenyl radicals or the group represents a morpholyl or piperidyl radical; A represents the residue of carbonic, sulphurous, phenyldithiophosphoric, C1-C4 alkoxy-substituted phenyldithiophosphoric, phthalic, halogen substituted phthalic or maleic acid; and X represents an eletron pair or a sulphur atom, in admixture with a solid or liquid diluent or carrier.