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US 6,231,790 B1Granted
Tetrakis-pentafluorophenyl borates from pentafluorophenyl grignard reagents
AssigneeBoulder Scientific Company
InventorFredric Askham
Life of this patent
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Abstract
Pentafluorophenyl Grignard reagents are reacted with a boron trihalide in a non-ethereal solvent such as toluene to produce a tetrakis pentafluorophenyl borate magnesium halide.
Claims7
The method which comprises:
- (i) reacting a boron trihalide with a solution in a solvent which contains no free ether of a pentafluorophenyl magnesium bromide or chloride
- wherein a tetrakis-pentafluorophenyl borate magnesium bromide or chloride is produced.
The method which comprises
- (i) providing a first solution of C6F5 MgBr in ethyl ether;
- (ii) adding toluene to provide a second solution of said C6F5 MgBr in a mixture of said ethyl ether and toluene;
- (iii) removing the ether from said second solution wherein a third solution of C6F5 MgBr in toluene is formed;
- and
- (iv) optionally isolating said C6F5 MgBr from said third solution.
2 more elements
The method which comprises:
- (i) reacting a boron trihalide with a solution of a pentafluorophenyl magnesium bromide or chloride in solution in a solvent that contains no free ethyl ether
- wherein a tetrakis-pentafluorophenyl borate magnesium bromide or chloride is produced.
A method for preparing a toluene or methyl cyclohexane solution of a Grignard reagent which comprises:
- (i) providing a first solution of said Grignard reagent ethyl ether;
- (ii) adding toluene or methyl cyclohexane to said first solution to provide a second solution of said Grignard reagent in a solvent mixture of ethyl ether and toluene or methyl cyclohexane;
- and
- (iii) removing said ethyl ether from said step (ii) second solution,
- wherein a non-ethereal solution of said Grignard reagent in said toluene or methyl cyclohexane is produced.
2 more elements
Dependencies are inferred from the claim text.