Patent ID: 6248265
Filing Date: 2001-06-19
Classification: C07F

Abstract:
A process which comprises:a) forming a mixture comprising (i) hydrocarbyl Grignard reagent, (ii) at least one fluoroaromatic compound in which bonded directly to an aromatic ring are (1) at least two fluorine atoms, or at least two perfluorohydrocarbyl groups, or at least one fluorine atom and at least one perfluorohydrocarbyl group, and (2) at least two hydrogen atoms, or a combination of one halogen atom other than a fluorine atom and at least one hydrogen atom, and (iii) an anhydrous liquid organic reaction medium, in which the molar ratio of (i) to (ii) is greater than 1, such that a reaction product mixture is formed comprising fluoroaryl Grignard reagent and excess hydrocarbyl Grignard reagent; andb) mixing with at least a portion of said reaction product mixture produced in a) an amount of at least one fluoroaromatic compound in which bonded directly to an aromatic ring are (1) at least two fluorine atoms, or at least two perfluorohydrocarbyl groups, or at least one fluorine atom and at least one perfluorohydrocarbyl group, and (2) at least two hydrogen atoms, or a combination of one halogen atom other than a fluorine atom and at least one hydrogen atom, at least sufficient to react with said excess hydrocarbyl Grignard reagent to thereby produce a further reaction product mixture composed predominately of fluoroaryl Grignard reagent and anhydrous liquid organic reaction medium.