Patent ID: 6683218
Filing Date: 2004-01-27
Classification: C07F

Abstract:
A process for preparing a tetrakis(fluoroaryl)borate derivative expressed by Formula (10): where each of R2-R4 and R6-R10 represents one of a hydrogen atom, a fluorine atom, a hydrocarbon group, and an alkoxy group, while at least one of R6-R10 represents a fluorine atom, Xc represents one of a chlorine atom, a bromine atom, and an iodine atom, and n represents one of 2 and 3, comprising,(A) reacting an aryl fluoride expressed by Formula (6): â€ƒwhere each of R2-R4 represents one of a hydrogen atom, a fluorine atom, a hydrocarbon group, and an alkoxy group; halogenated hydrocarbon expressed by Formula (7): R0Xaâ€ƒâ€ƒ(7) â€ƒwhere R0 represents a hydrocarbon group, and Xa represents one of a chlorine atom, a bromine atom, and an iodine atom; and magnesium with one another in a solvent (a) containing diethyl ether and/or tetrahydrofuran to obtain a reaction mixture containing a fluoroaryl magnesium derivative expressed by Formula 8): â€ƒwhere each of R2-R4 represents one of a hydrogen atom, a fluorine atom, a hydrocarbon group, and an alkoxy group, and Xa represents one of a chlorine atom, a bromine atom, and an iodine atom, said reaction being carried out by mixing said aryl fluoride of Formula (6), said magnesium and solvent (a), and thereafter adding said halogenated hydrocarbon of Formula (7) to a resultant mixture, (B) without isolating said fluoroaryl magnesium derivative (8) from the reaction mixture obtained in (A), reacting said fluoroaryl magnesium derivative (8) with boron halide expressed by Formula (2) BXb3â€ƒâ€ƒ(2) â€ƒwhere Xb represents one of a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, (C) adding a resulting reaction solution to a solvent (b) having a higher boiling point than diethyl ether and/or tetrahydrofuran, (D) distilling out diethyl ether and/or tetrahydrofuran to obtain a (fluoroaryl)borane compound expressed by Formula (9): â€ƒwhere each of R2-R4 represents one of a hydrogen atom, a fluorine atom, a hydrocarbon group, and an alkoxy group, Xb represents one of a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and n represents one of 2 and 3, and (E) reacting said (fluoroaryl)borane compound with a fluoroaryl magnesium derivative expressed by Formula (4): â€ƒwhere each of R6-R10 represents one of a hydrogen atom, a fluorine atom, a hydrocarbon group, and an alkoxy group, while at least one of R6-R10 represents a fluorine atom, and Xc represents one of a chlorine atom, a bromine atom, and an iodine atom.