Process for preparing a tetrakis(fluoroaryl) borate derivative
US6683218B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1997 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Oct 21, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F5/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A fluoroaryl magnesium derivative expressed by General Formula (1): where each of R1-R5 represents a hydrogen atom, a fluorine atom, a hydrocarbon group, or an alkoxy group while at least one of R1-R5 representing a fluorine atom, and Xa represents a chlorine atom, a bromine atom, or an iodine atom; andboron halide expressed by General Formula (2):BXb3  (2) where Xb represents a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, are reacted with each other in a solvent (a) containing diethyl ether and/or tetrahydrofuran, after which the resulting reaction solution is added to a solvent (b) having a higher boiling point than diethyl ether and/or tetrahydrofuran while diethyl ether and/or tetrahydrofuran are distilled out. Consequently, it has become possible to obtain a (fluoroaryl)borane compound expressed by General Formula (3):  where each of R1-R5, and Xb, represents the same as above, and n represents 2 or 3, from which magnesium halide produced as a by-product is separated and removed, selectively in a simple manner at a low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.