The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2006
Filed:
Dec. 07, 2001
Olivier Guerret, Mazerolles, FR;
Jean-luc Couturier, Lyons, FR;
Christophe Le Mercier, Caluire et Cuire, FR;
Olivier Guerret, Mazerolles, FR;
Jean-Luc Couturier, Lyons, FR;
Christophe Le Mercier, Caluire et Cuire, FR;
Arkema (formerly Atofina), Puteaux, FR;
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.