Process for the purification of pentafluorophenyl boron compounds
US5959151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Apr 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F5/027
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.