Method for preparing β-phosphorus nitroxide radicals

Details Method for preparing β-phosphorus nitroxide radicals Method for preparing β-phosphorus nitroxide radicals

2006-10-24

2006-10-24

Solola, Taofiq (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

C558S073000, C568S012000, C568S014000

Reexamination Certificate

active

07126021

ABSTRACT:
The present invention relates to a process for the preparation of β-phosphorated nitroxide radicals which consist in preparing, in a first step, an aminophosphonate by reaction of a carbonyl compound, of a primary amine and of a phosphorous compound in the presence of a Lewis acid and then, in a second step, in oxidizing the said crude aminophosphonate using nonhalogenated organic peracids in a water/organic solvent two-phase medium with an aqueous phase buffered at a pH ranging from 5 to 12.

REFERENCES:
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patent: 6538141 (2003-03-01), Gillet et al.
patent: 6624322 (2003-09-01), Gillet et al.
patent: 6646079 (2003-11-01), Guerret et al.
patent: WO 9624620 (1996-08-01), None
patent: WO 0040526 (2000-07-01), None
patent: WO 0040550 (2000-07-01), None

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