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:
Jun. 17, 2003
Filed:
Apr. 23, 2001
Applicant:
Inventors:
Assignee:
Rhodia Chimie, Courbevoie Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 5/02 ;
U.S. Cl.
CPC ...
C07F 5/02 ;
Abstract
The invention concerns a novel method for preparing tetrakis(pentafluorophenyl)borate derivatives of general formula MB(C F ) , M being selected among Na , Li , or K , wherein: (a) a C F X solution, X being selected among H, Cl, Br or I, in anhydrous butylic ether is contacted with an alkyllithium, the mol ratio of C F X/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 BR , 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.