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US 6,441,216 B1Granted
Method of preparing lithium complex salts for use in electrochemical cells
AssigneeMerck Patent Gesellschaft mit beschraenkter Haftung
InventorsAndrei Leonov, Armin de Meijere, Michael Schmidt
Life of this patent
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Abstract
The invention relates to a method of preparing lithium complex salts and their intermediaries and to the use of these in electrolytes.
Claims14
A method of preparing a lithium complex salt of the formula (I)
- where
- R1 and R2 are optionally directly linked to one another via a single or double bond, and each, independently is phenyl, naphthyl, anthracenyl or phenanthrenyl, optionally mono- to hexasubstituted by C1-C6 alkyl, C1-C6-alkoxy or halogen;
- or each independently is pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- or each independently is hydroxybenzenecarboxyl, hydroxynaphthalenecarboxyl, hydroxy-benzenesulfonyl or hydroxynaphthalenesulfonyl, each optionally mono- to tetrasubstituted by C1-C6 alkyl, C1-C6-alkoxy groups or halogen;
- ring substituents R3-R6 are optionally directly linked to an adjacent ring substituent via a single or double bond and are C1-C6-alkyl, C1-C6-alkoxy or halogen, phenyl, naphthyl, anthracenyl or phenanthrenyl,
- each optionally mono- to hexasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- said method comprising:
- a) admixing a 3-, 4-, 5-, 6-substituted phenol in a suitable solvent with chlorosulfonic acid to form a first intermediate;
- b) reacting the first intermediate from a) with chlorotrimethylsilane to form a second intermediate;
- and
- c) reacting the second intermediate from b) with lithium tetramethanolate borate (1−) in a suitable solvent to produce an end product of formula (I) therefrom.
9 more elements
A method of preparing a compound of formula (I)
- where
- R1 and R2 are optionally directly linked to one another via a single or double bond,
- and each, independently is phenyl, naphthyl, anthracenyl or phenanthrenyl, optionally mono- to hexasubstituted by C1-C6 alkyl, C1-C6-alkoxy or halogen,
- or each independently is pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- or each independently is hydroxybenzenecarboxyl, hydroxynaphthalenecarboxyl, hydroxybenzenesulfonyl or hydroxynaphthalenesulfonyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- ring substituents R3-R6 are optionally directly linked to an adjacent ring substituent via a single or double bond and are C1-C6-alkyl, C1-C6-alkoxy or halogen, phenyl, naphthyl, anthracenyl or phenanthrenyl, each optionally mono- to hexasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy or halogen;
- comprising:
- reacting a compound of formula II
- where R1 and R2 are each independently:
- H, C1-C6-alkyl or C1-C6-trialkylsilyl,
- ring substituents R3-R6 are optionally directly linked to an adjacent ring substituent via a single or double bond, and are C1-C6-alkyl, C1-C6-alkyloxy or halogen;
- phenyl, naphthyl, anthracenyl or phenanthrenyl, each optionally mono- to hexasubstituted by C1-C6-alkyl, C1-C6-alkoxy groups or halogen;
- pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C1-C6-alkyl, C1-C6-alkoxy groups or halogen;
- with lithium tetrametholate borate.
12 more elements
Dependencies are inferred from the claim text.