Process for the synthesis of diethyl ethylphosphonate
US5473093A · kind A · utility
1Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Jan 10, 1995 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jan 10, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4075
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Diethyl ethylphosphonate is formed by the catalytic rearrangement of triethyl phosphite in a reaction medium at elevated temperature, preferably using an ethyl iodide as the rearrangement catalyst, employing a heel of diethyl ethylphosphonate in the reaction medium when the reaction is begun with maintaining of the reaction medium at a temperature above the boiling point of the triethyl phosphite (for example, a temperature of from about 175.degree. C. to about 185.degree. C.) and addition of the triethyl phosphite to the reaction medium at a rate slow enough to maintain that temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.