Process for the purification of pentafluorophenyl boron compound

Details Process for the purification of pentafluorophenyl boron compound Process for the purification of pentafluorophenyl boron compound

1998-04-09

1999-09-28

Geist, Gary

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

Organic compounds

568 6, C07F 502

Patent

active

059591510

ABSTRACT:
One aspect of the invention is a process for purifying a pentafluorophenyl boron compound from a crude mixture comprised of the pentafluorophenyl boron compound and impurities, the impurities at least comprised of an ether and water, the process comprising: (a) mixing the crude mixture with an azeotropic organic solvent which (i) is capable of azeotrope formation with the water and (ii) has a boiling point above the boiling point of the ether; (b) distilling the resulting solution to remove at least a portion of the impurities; and (c) cooling the distilled solution so that a precipitate comprised of the pentafluorophenyl boron compound is formed. Processes are also described for producing pentafluorophenyl boron compounds which are particularly pure, dry and fine.

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CA:128:167512, abs in Angew Chem Int Ed Engl 36(24),pp.771-2774 by Karl, 1997.

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