Patent · US Expired

Process for the preparation of tetrakis (pentafluorophenyl) borate derivatives

US6700019B2 · kind B2 · utility

1Cited by

3References

3Claims

0Family size

Assignee

RHODIA CHIMIE · FR

Inventors

Michel Dury · Val-de-Reuil, FR
Christian Priou · Clermont-Ferrand, FR
Jacques Richard · Toulouse, FR

Key dates

Filing date	Dec 5, 2002
Grant date	Mar 2, 2004
Priority date	—
Expiry date	Dec 5, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F5/027
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention concerns a novel method for preparing tetrakis(pentafluorophenyl)borate derivatives of general formula MB(C6F5)4, M being selected among Na+, Li+, or K+, wherein: (a) a C6F5X solution, X being selected among H, Cl, Br or I, in anhydrous butylic ether is contacted with an alkyllithium, the mol ratio of C6F5X/alkyllithium being 1 to 1.1, and the alkyl radical, linear or branched comprising 1 to 10 carbon atoms; (b) the resulting product is contacted with previously non-dissolved BR3, R, identical or different being selected among a chlorine atom, a fluorine atom, a bromine atom, an alkoxy radical comprising between 1 and 4 carbon atoms.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.