Process for preparing alkyl- or aryl-phosphonothioic dihalides
US3962323A · kind A · utility
2Cited by
2References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 14, 1974 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Nov 14, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.