Method of producing tetrakis (pentafluorophenyl) borate derivati

Details Method of producing tetrakis (pentafluorophenyl) borate derivati Method of producing tetrakis (pentafluorophenyl) borate derivati

1993-12-22

1996-02-20

Geist, Gary L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Boron containing

C07C 502

Patent

active

054930561

ABSTRACT:
The invention relates to a method for producing tetrakis(pentafluorophenyl)borate derivatives of the formula (C.sub.6 F.sub.5).sub.4 BM which comprises reacting 1 equivalent of pentafluorobenzene with 0.5 to 1.5 equivalents of an organometallic compound RM at -120.degree. to 80.degree. C., in an ether type solvent, a hydrocarbon type solvent or a mixture thereof, to generate pentafluorophenyl alkali metal salt represented by the formula C.sub.6 F.sub.5 M, and then reacting either (1) not less than 3.7 equivalents of said pentafluorophenyl alkali metal salt with 1 equivalent of a boron compound BX.sub.3, or (2) not less than 0.8 equivalents of said pentafluorophenyl alkali metal salt with 1 equivalent of tris(pentafluorophenyl)borane.

REFERENCES:
patent: 3311662 (1967-03-01), Washburn et al.
Harper et al., J. Organic Chemistry, vol. 29, pp. 2385-2389, 1964 "Reactions of Organometallics with Fluoroaromatic Compounds".
Kobayashi et al, Chem. Abstracts, vol. 100, No. 17, p. 660, 1984; AN139179s, "Synthesis of Trifluoromethylated Tetraphenylborates . . . ".
Massey et al, Chem. Abstracts, vol. 59, No. 8, 1963; AN 8771b; "Tris(Penta Fluorophenyl)Boron".
Journal of Organometallic Chemistry, vol. 2, 1964, A. G. Massey, et al., "Perfluorophenyl Derivatives of the elements I. Tris(Pentafluorophenyl)Boron", pp. 245-250.

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