Process for preparing halogenated diaryl hydrogen phosphates

Details Process for preparing halogenated diaryl hydrogen phosphates Process for preparing halogenated diaryl hydrogen phosphates

1975-11-24

1977-11-22

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260965, C07F 909

Patent

active

040596559

ABSTRACT:
Halogenated diaryl hydrogen phosphates having in admixture only a minor proportion of monoaryl and triaryl phosphates are prepared by selectively hydrolyzing a corresponding triaryl phosphate or by reacting 2,6-dihalophenols having bromine or iodine atoms in the 2 and 6 positions with a phosphorous oxyhalide in the presence of an aromatic tertiary amine or carboxylic acid amide and, preferably, an inert organic solvent to form a mixture of diarylphosphorohalidate and triaryl phosphate and hydrolyzing the mixture.

REFERENCES:
patent: 3155706 (1964-11-01), Camacho et al.
patent: 3163670 (1964-12-01), Rosemund et al.
patent: 3657398 (1972-04-01), Ismail

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