Method for preparing &bgr;-phosphorous nitroxide radicals
US6624322B1 · kind B1 · utility
8Cited by
4References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Nov 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4006
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a method for preparing &bgr;-phosphorous nitroxide radicals which comprises preparing in a first step an aminophosphonate by reacting a carbonyl compound, a primary amine and a phosphorous compound, then in a second step in oxidizing said aminophosphonate using on-halogenated organic peracids in a two-phase organic water/solvent medium with a buffered aqueous phase with a pH ranging between 5 and 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.