Patent ID: 6476271
Filing Date: 2002-11-05
Classification: C07F

Abstract:
A method for preparing sodium or potassium tetrakis(pentafluorophenyl) borate compound from a pentafluorophenyl magnesium bromide comprising the steps of:reacting the (pentafluorophenyl) magnesium bromide in an ether with a tris(pentafluorophenyl) borane in an aromatic hydrocarbon solvent to produce tetrakis(pentafluorophenyl) borate magnesium bromide; reacting the tetrakis(pentafluorophenyl) borate magnesium bromide with an aqueous solution of a halide selected from the group consisting of sodium chloride and potassium chloride to create an organic phase containing a product compound selected from the group consisting of tetrakis(pentafluorophenyl) borate sodium salt and tetrakis(pentafluorophenyl) borate potassium salt; separating the organic phase; and removing solvent from the organic phase to provide a substantially ether-free compound selected from the group consisting of sodium tetrakis(pentafluorophenyl) borate and potassium tetrakis(pentafluorophenyl) borate.