Preparation of O-alkyl, S,S-dialkylphosphorodithioates

Details Preparation of O-alkyl, S,S-dialkylphosphorodithioates Preparation of O-alkyl, S,S-dialkylphosphorodithioates

1987-07-24

1990-08-21

Sutto, Anton H.

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

Organic compounds

Phosphorus esters

558 99, C07F 917

Patent

active

049507842

ABSTRACT:
The O-alkyl S,S-dialkylphosphorodithioates, e.g., ethoprophos, are facilely prepared, in improved yields and having great purity, by reacting an alkylphosphate dihalogenide, e.g., a dichloride, with a 1.5 to 8 mol excess of a thiol, in the presence of a 0.1 to 5 mol excess of an acid acceptor, with both molar excesses being per mole of said dihalogenide.

REFERENCES:
patent: 3112244 (1963-11-01), Goyette
patent: 3839510 (1974-10-01), Kudamatsu et al.
patent: 4596796 (1986-06-01), Yamamoto et al.

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