Preparation of O,S-dimethyl-thiol-phosphoric acid diester-amide
US4001353A · kind A · utility
2Cited by
2References
3Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 27, 1974 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Mar 27, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/1658
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The new compound tetramethyl-dithiolpyrophosphoric acid ester of the formula ##EQU1## is produced by reacting phosgene with an alkali metal or ammonium salt of O,S-dimethylthiolphosphoric acid ester, preferably in a diluent. By-product chloride salt precipitates out and the solvent can be separated from the desired product or the solution can be directly reacted with ammonia to form the insecticidally active O,S-dimethylthiolphosphoric acid diester-amide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.