Process for the formation of pentaerythritol-based phosphorous heterocycles
US5237085A · kind A · utility
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8Claims
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Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65748
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the formation of pentaerythritol-based phosphorus heterocycles comprises the reaction of a pentaerythritol polyol, e.g., pentaerythritol, with a trivalent or pentavalent phosphorus compounds, e.g., a phosphorus oxytrihalide, a triorganophosphite, or a phosphorus trihalide, in an aryl phosphate solvent at elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.