Processes for the Preparation of Tetrakis(F Aryl)Borate Salts
AssigneeAlbemarle Corporation
InventorBruce C. Berris
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Abstract
A process for the preparation of organic cation tetrakis(Faryl) borate salts. The process includes preparation of intermediate, mono-hydrazine substituted (Faryl) compound, from (Faryl) compound using hydrazine at temperatures below 78° C. A stoichiometric excess of hydrazine to the (Faryl) compound to the (Faryl) compound is used. The process further includes the preparation of the organic cation tetrakis(Faryl) borate in ethereal medium.
Claims29
A process for preparing (Faryl) hydrazine compound comprising combining (Faryl) compound and hydrazine in solvent below about 78° C.
(canceled)
5-6. (canceled)
A process comprising:
- (i) combining brominated (Faryl) compound and alkyllithium in the presence of first solvent comprising ether to produce first product;
- (ii) combining at least a portion of the first product and boron trihalide to produce second product;
- and
- (iii) isolating tetrakis(Faryl)borate salt from the second product.
9-11. (canceled)
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A process comprising:
- (i) combining (Faryl) compound and hydrazine in solvent below about 78° C. to form (Faryl)hydrazine;
- (ii) converting at least a portion of the (Faryl) hydrazine to bromo(Faryl) compound;
- (iii) combining at least a portion of the bromo(Faryl) compound and alkyllithium in ethereal medium to form reaction mixture;
- (iv) combining boron trihalide compound and at least a portion of the reaction mixture to form lithium tetrakis(Faryl) borate;
- and
- (v) exchanging lithium cation from at least a portion of the lithium tetrakis(Faryl) borate for cation of organic salt to form tetrakis(Faryl) borate salt.
20-21. (canceled)
(canceled)
(canceled)
27-28. (canceled)
A process comprising:
- (i) combining octafluoronaphthalene and a stoichiometric excess of hydrazine in solvent below about 78° C. to form heptafluoronaphthyl hydrazine;
- (ii) combining at least a portion of the heptafluoronaphthyl hydrazine and component comprising hydrogen bromide to form bromoheptafluoronaphthalene;
- (iii) combining at least a portion of the bromoheptafluoronapthalene in ethereal medium and alkyllithium to form reaction mixture;
- (iv) combining boron trihalide compound and at least a portion of the reaction mixture to form lithium tetrakis(heptafluoronaphthyl)borate in the ethereal medium;
- (v) exchanging at least a portion of the ethereal medium with halogenated hydrocarbon;
- (vi) exchanging lithium cation of at least a portion of the lithium tetrakis(heptafluoronaphthyl)borate with organic cation;
- and
- (vii) precipitating tetrakis(heptafluoronaphthyl)borate salt from at least a portion of the halogenated hydrocarbon with organic cation.
Dependencies are inferred from the claim text.