Preparation of O,S-dimethyl-thiol-phosphoric acid diester-amide

Details Preparation of O,S-dimethyl-thiol-phosphoric acid diester-amide Preparation of O,S-dimethyl-thiol-phosphoric acid diester-amide

1974-03-27

1977-01-04

Raymond, Richard L.

Chemistry of carbon compounds

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

260959, 260988, C07F 924

Patent

active

040013537

ABSTRACT:
The new compound tetramethyl-dithiolpyrophosphoric acid ester of the formula ##EQU1## is produced by reacting phosgene with an alkali metal or ammonium salt of O,S-dimethylthiolphosphoric acid ester, preferably in a diluent. By-product chloride salt precipitates out and the solvent can be separated from the desired product or the solution can be directly reacted with ammonia to form the insecticidally active O,S-dimethylthiolphosphoric acid diester-amide.

REFERENCES:
patent: 2434357 (1948-01-01), Fischer
patent: 3167574 (1965-01-01), Brown et al.
Kosolapoff, Organophosphorus Compounds, John Wiley & Sons, Inc., New York, (1950), p. 294.
Arbuzov et al., Bull. Acad. Sci. USSR, Div. Chem. Sci., 1954, pp. 909-912.
Houben-Weyl, Methoden des Organischen Chemie, 1964, p. 404.

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