Preparation of halohydrocarbyl phosphonic acid diesters
US7435841B2 · kind B2 · utility
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13References
20Claims
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Key dates
| Filing date | Mar 8, 2005 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Mar 19, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4075
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a process for the production of halohydrocarbyl phosphonic acid diesters via a Michaelis-Arbuzov type reaction which results in high conversion and selectivity of product with ease of purification; the improvement comprises reacting hydrocarbyl halide with trihdydrocarbyl phosphite in a molar ratio of about 6:1 and in the presence of an effective amount of a polarity lowering additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.