Process for making O,S-dimethyl phosphoramidothioate

Details Process for making O,S-dimethyl phosphoramidothioate Process for making O,S-dimethyl phosphoramidothioate

1997-12-10

1999-07-13

Ambrose, Michael G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

558199, C07F 924

Patent

active

059228962

ABSTRACT:
The present invention provides a method for making O,S-dimethyl phosphoramidothioate. In accordance with the present process, O,O-dimethyl phosphoramidothioate is isomerized in the presence of a catalyst at a temperature of from about 35.degree. C. to about 45.degree. C. to form a mixture containing O,S-dimethyl phosphoramidothioate and the resultant mixture is lagered at a temperature of from about 35.degree. C. to about 45.degree. C. for about 3 to 6 hours. The total time for both steps is at least about 4 hours.

REFERENCES:
patent: 3309266 (1967-03-01), Magee
patent: 3639547 (1972-02-01), Magee
patent: 4389350 (1983-06-01), Lonsinger et al.

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