Method of producing tetrakis (pentafluorophenyl) borate derivatives using pentafluorophenyl alkali metal salt prepared from pentafluorobenzene

摘要

The invention relates to a method for producing tetrakis(pentafluorophenyl)borate derivatives of the formula (C6F5)4BM which comprises reacting 1 equivalent of pentafluorobenzene with 0.5 to 1.5 equivalents of an organometallic compound RM at -120 DEG to 80 DEG C., in an ether type solvent, a hydrocarbon type solvent or a mixture thereof, to generate pentafluorophenyl alkali metal salt represented by the formula C6F5M, and then reacting either (1) not less than 3.7 equivalents of said pentafluorophenyl alkali metal salt with 1 equivalent of a boron compound BX3, or (2) not less than 0.8 equivalents of said pentafluorophenyl alkali metal salt with 1 equivalent of tris(pentafluorophenyl)borane.