Process for preparing alkyl- or aryl-phosphonothioic dihalides

Details Process for preparing alkyl- or aryl-phosphonothioic dihalides Process for preparing alkyl- or aryl-phosphonothioic dihalides

Filed on

1974-11-14

Date issued

1976-06-08

Examiner

Love, Ethel G.

Patent Class

Chemistry of carbon compounds

SubClass

Miscellaneous organic carbon compounds

SubSubClass

C-metal

Other Related Categories

260961, 260999, C07F 942

Type

Patent

Status

active

Patent number

039623238

Description

ABSTRACT:
Alkyl- or arylphosphonothioic dihalides are prepared by contacting a reactant selected from the group consisting of mono-alkyl or aryl mercapto phosphorothionodihalidate, dialkyl or aryl mercapto phosphorothionohalidate or tri- alkyl or aryl tetrathiophosphate with phosphorus trihalide under at least autogenous pressure at a temperature of from about 200.degree.C. to about 400.degree.C. The compounds obtained are useful as constituents in insecticides, fungicides and pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

REFERENCES:
patent: 3461189 (1969-08-01), Nagel
patent: 3803226 (1974-04-01), Uhing et al.
B368,128; Jan., 1975; Froment et al.

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