Halogenated esters of the phosphoric acids

Abstract

Abstract Halogenated esters of phosphoric acids of the formula: WHEREIN R represents alkyl, X represents oxygen, Y represents halogen, other than fluorine, R3 represents phenylene, halogenated phenylene, diphenylene, halogenated diphenylene, diphenylenealkane or halogenated diphenylenealkane, n is 0 or 1 and m is a whole number of from 2 to 4, as well as mono(nitrophenyl)-di-polyhalophenyl phosphites or phosphates and di(nitrophenyl)-polyhalophenyl phosphites or phosphates. The above compounds have utility as insecticides, acaricides, pesticides and bactericides. They are also useful as flame retardants for plastics and as difficulty combustible dielectrics. They are prepared by condensing an acid halide of phosphorus of the formula: WHEREIN R1 is alkyl, alkenyl, cycloalkyl or aryl, R2 is alkoxy (C1 4), halogenated alkoxy (C1 4), cyclo-alkoxy or aryloxy, a and b are whole numbers having a value of from 0 to 2, the sum of a + b not exceeding 2 and n, R3, X and Y are as above defined, with a halogenated phenol or alkyl substituted halogenated phenol WHEREIN R, Y and m are as above defined, in the presence of a catalytic amount of at least one member of the group of tertiary amines, the amino group of which is part of an aromatic ring system, acid amides of phosphorus, arsenic and antimony compounds having bonds to organic radicals and salts of such amines and amides, at a temperature of from 50* to 220*C.

Inventors

• 👤 Roshdy Ismail

Bibliographic Details