Ion liquid of amino acid ester cation and its preparation method

A technology of ionic liquid and amino acid, which is applied to the ionic liquid of amino acid ester cation, the preparation of ionic liquid, the field of ionic liquid and its preparation, and achieves the effects of easy operation, low preparation cost and simple equipment

Inactive Publication Date: 2005-06-01
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently reported ionic liquid cations only contain alkyl groups and derivative groups thereof, so far there is no ionic liquid report using amino acid esters as cations, and the preparation method of this ionic liquid containing amino acid ester cations is also mentioned for the first time in the present invention

Method used

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  • Ion liquid of amino acid ester cation and its preparation method
  • Ion liquid of amino acid ester cation and its preparation method
  • Ion liquid of amino acid ester cation and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: L-alanine methyl ester nitrate ionic liquid

[0020] Dissolve 2.79g (0.020mol) of L-alanine methyl ester hydrochloride in 10mL of methanol solution, 3.40g (0.020mol) of silver nitrate in 150mL of methanol solution, mix the two solutions thoroughly, and filter. The filtrate was evaporated to dryness by rotary evaporation at 60°C to obtain a colorless or light yellow transparent liquid, which was L-alanine methyl nitrate ionic liquid. The reaction temperature is room temperature 24°C, and the yield: 93%. The reaction formula is:

[0021]

Embodiment 2

[0022] Embodiment 2: L-alanine methyl ester tetrafluoroborate ionic liquid

[0023] Weigh 2.79g (0.020mol) of L-alanine methyl ester hydrochloride and 2.64g (0.024mol) of sodium tetrafluoroborate, stir in 50mL of acetonitrile for 24-72 hours, and filter. The filtrate was evaporated to dryness by rotary evaporation at 80°C to obtain a colorless or light yellow transparent liquid, which was L-alanine methyl tetrafluoroborate ionic liquid. The reaction temperature is room temperature 24°C, and the yield: 75%. The reaction formula is:

[0024]

Embodiment 3

[0025] Embodiment 3: L-alanine methyl ester hexafluorophosphate ionic liquid

[0026] Weigh 2.79g (0.020mol) of L-alanine methyl ester hydrochloride and 4.42g (0.024mol) of potassium hexafluorophosphate, stir in 50mL of acetonitrile for 24-72 hours, and filter. The solvent was removed from the filtrate by rotary evaporation at 80° C. to obtain a light yellow liquid, namely L-alanine methyl hexafluorophosphate ionic liquid. The reaction temperature is room temperature 24°C, and the yield: 75%. The reaction formula is:

[0027]

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Abstract

The present invention is ion liquid of amino acid ester cation and its preparation process, and belongs to the field of new chemical material and its preparation technology. The ion liquid of amino acid ester cation is prepared with amino acid ester hydrochloride and through the substitution reaction with nitrate, tetrafluoroborate, hexafluorophosphate, bistrifluoromesyl imine salt or thiocyanate or the direct addition reaction with aluminum trichloride, ferric trichloride or zinc chloride, and the separation. The ion liquid thus prepared has the characteristic of chiral matter except the ion liquid characteristics, has low cost, simple preparation process and no pollution. The present invention is suitable for industrial production and is expected to become important green chemical material.

Description

Technical field: [0001] The invention relates to an ionic liquid and a preparation method thereof, in particular to a novel ionic liquid of amino acid ester cations and a preparation method of the ionic liquid, belonging to the technical field of new chemical materials and their preparation. Background technique: [0002] Ionic liquid is a kind of molten salt at room temperature. At close to room temperature (<100°C), it is a low-viscosity liquid composed entirely of ions. Ionic liquids are generally composed of organic cations and inorganic or organic anions. The research on ionic liquids can be traced back to 1914, when the first research object was ethylamine nitrate. As an excellent electrolyte, ionic liquids have been studied in the field of electrochemistry in the early stage. By the mid-1980s, it was discovered that ionic liquids are good solvents and brand-new catalytic materials, which have properties unmatched by organic solvents and traditional catalysts. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04C07C227/16
Inventor 寇元陶国宏何玲孙宁
Owner PEKING UNIV
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