Process for production of thiophosphonates

Details Process for production of thiophosphonates Process for production of thiophosphonates

1988-12-12

1990-09-11

Sutto, Anton H.

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

Organic compounds

Phosphorus esters

558 83, 558101, C07F 940

Patent

active

049564870

ABSTRACT:
Thiophosphonate compounds having the formula ##STR1## in which R is alkyl, haloalkyl or aryl; X is chloro or SR.sub.2 ; R.sub.1 is alkyl or aryl; and when X is SR.sub.2 then R.sub.2 is a group identical to R.sub.1, or R.sub.1 and R.sub.2 taken together form an optionally alkyl-substituted polymethylene group, are prepared by reaction of a thiophosphonodichloride with a mercaptan in the presence of a catalytic amount of a quaternary ammonium or phosphonium salt, a tertiary amine or hydrohalide thereof or an alkali metal halide combined with a Crown ether, in the substantial absence of a base.

REFERENCES:
patent: 3094405 (1963-06-01), Toy et al.
patent: 3162570 (1964-12-01), Wilson, Jr.
patent: 3790649 (1974-02-01), Schumacher
patent: 3965220 (1976-06-01), Schumacher et al.
patent: 4352762 (1982-10-01), Fahmy
Nesterov et al., "Zh. Obshch. Khim., vol. 40," 1237 (1970), (English Translation).
Minich et al., CA 70:37096g: Izv-Akad. Nauk SSSR, Ser. Khim., 1792-1797, (1969).

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