Process for the formation of dialkyl phosphorochloridothionates

Details Process for the formation of dialkyl phosphorochloridothionates Process for the formation of dialkyl phosphorochloridothionates

1982-12-30

1985-03-26

Sutto, Anton H.

Chemistry of carbon compounds

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

C07F 920

Patent

active

045072523

ABSTRACT:
Dialkyl phosphorochloridothionates are formed by the chlorination of an alkyl ester of dithiophosphoric acid in a two-stage chlorination reaction. In the first stage, a major portion (e.g., 65% to 95%) of the alkyl ester to be chlorinated is reacted with up to about 95% of the total chlorine to be utilized in the process. The remaining alkyl ester is added to the product from the first stage chlorination reaction and is further chlorinated such that the total chlorine added in the process is about 1 mole per each 0.95 to 1.1 mole of the acid ester utilized in the process.

REFERENCES:
patent: 4322747 (1982-06-01), Watson, Jr.
patent: 4354983 (1982-10-01), Roszinski et al.

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