An improved process for making o,s-dimethyl...

Details An improved process for making o,s-dimethyl... An improved process for making o,s-dimethyl...

C - Chemistry, Metallurgy

07

F

C07F 9/24 (2006.01)

Patent

CA 2254516

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°C to about 45°C to form a mixture containing O,S-dimethyl phosphoramidothioate and the resultant mixture is lagered at a temperature of from about 35°C to about 45°C for about 3 to 6 hours. The total time for both steps is at least about 4 hours.

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