Mercaptals phosphorylés

摘要

The invention comprises compounds of formula where alkylene contains 1-3 carbons; X is oxygen or sulphur (same or different); R and R1 are C1-8 alkyl; R2 is C1-8 alkyl, carbalkoxyalkyl, benzyl, chlorobenzyl, phenyl, alkylphenyl or halophenyl; R3 is hydrogen, C1-8 alkyl, phenyl or where R5 and R6 are C1- 8 alkyl; and R4 is C1- 8 alkyl, carbalkoxyalkyl, benzyl, chlorobenzyl, phenyl, alkylphenyl, halophenyl or where R7 and R8 are C1- 8 alkyl. They are prepared by reacting with HSR2 and/or HSR4, optionally in the presence of an acid catalyst.ALSO:Pesticidal compositions comprise organophosphorus compounds of formula where alkylene contains 1-3 carbons, X is oxygen or sulphur (same or different), R and R1 and C1-8 alkyl, R2 is C1-8 alkyl, carbalkoxyalkyl, benzyl, chlorobenzyl, phenyl, alkylphenyl or halophenyl, R3 is hydrogen, C1-8 alkyl, phenyl or where R5 and R6 are C1-8 alkyl and R4 is C1-8 alkyl, carbalkoxyalkyl, benzyl, chlorobenzyl, phenyl, alkylphenyl, halophenyl or where R7 and R8 are C1-8 alkyl. Aqueous dispersions, solutions, wettable powders, vapours and dusts are specified.