Process for preparing alkoxyamines resulting from β-phosphorated nitroxides
US8394904B2 · kind B2 · utility
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Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Aug 13, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4006
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to an improved process for preparing alkoxyamines resulting from β-phosphorated nitroxides corresponding to the formula (I):by reaction with a halogenated derivative in the presence of an organometallic system. This process comprises carrying out the reaction in a water-miscible organic solvent and precipitating the alkoxyamine directly from the organic medium by adding an aqueous solution of a strong acid. These alkoxyamines can be used in particular as radical polymerizations initiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.