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L-hydrosulformidate type chiral ionic liquid and its prepn

A technology of chiral ionic liquid and hydrogen sulfate, which is applied in the preparation of cyanide reaction, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of difficult preparation, pollution, high cost, etc., and achieve low preparation cost and simple preparation , cheap effect

Inactive Publication Date: 2002-12-11
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

There are also some shortcomings in the preparation of ionic liquids in the past: lack of raw materials, high cost, generally more than twice that of commonly used organic solvents; difficult preparation, difficult product purification, not suitable for large-scale industrial production applications; usually with three The combination of aluminum chloride is easy to cause pollution and affects its application in green chemical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Alanine bisulfate chiral ionic liquid

[0021] Weigh 5.00g alanine (0.056mol, more than 99% purity, purchased by Shanghai Jier Biochemical Company) and put it into 50ml distilled H 2 In a beaker of O, add 98% H dropwise while stirring 2 SO 4 (analytical pure), H 2 SO 4 The dosage is 5.62g (0.056mol), i.e. the molar ratio of the reaction raw materials is 1:1, the transparent mixed solution is continued to be stirred at room temperature for 1 hour, then transferred to a rotary evaporator, evaporated to remove water at 40°C-50°C, and then The temperature was raised to 80° C.-85° C. and evaporated for 2 hours to obtain a colorless transparent alanine bisulfate chiral ionic liquid. The reaction formula is:

[0022]

Embodiment 2

[0023] Embodiment 2: Valine bisulfate chiral ionic liquid

[0024] Take by weighing 5.00g valine (0.043mol, more than 99% of purity, purchased by Shanghai Jier Biochemical Company) and put it into a container containing 50ml of distilled H 2 In a beaker of O, add 98% H dropwise while stirring 2 SO 4 (analytical pure), H 2 SO 4 The dosage is 4.2 g (0.043 mol), that is, the molar ratio of the reaction raw materials is 1:1. Continue to stir the transparent mixture at room temperature for 1 hour, transfer it to a rotary evaporator, evaporate water at 40°C-50°C, then heat up to 80°C-85°C for 2 hours, and finally obtain a colorless transparent valine Bisulfate chiral ionic liquid. The reaction formula is:

[0025]

Embodiment 3

[0026] Embodiment 3: leucine bisulfate chiral ionic liquid

[0027] Weigh 5.00g leucine (0.038mol, more than 99% purity, purchased by Shanghai Jier Biochemical Company) and put it into a 50ml distilled H 2 In a beaker of O, add 98% H dropwise while stirring 2 SO 4 (analytical pure), H 2 SO 4The dosage is 3.8g (0.038mol), that is, the molar ratio of the reaction raw materials is 1:1. Continue to stir the transparent mixture at room temperature for 1 hour, transfer it to a rotary evaporator, evaporate water at 40°C-50°C, then heat up to 80°C-85°C for 2 hours, and finally obtain a colorless transparent leucine Bisulfate chiral ionic liquid. The reaction formula is:

[0028]

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Abstract

The present invention relates to a new type chemical material and its preparation. L-hydrosulforamidate-type chiral ionic liquid is prepared through the full reaction of aqueous L-amino acid solutionwith 98% sulfuric acid. The produced L-hydrosulforamidate-type chiral ionic liquid has the features of both ionic liquid and chiral matter. The reaction has high product purity, low cost, no exhausted pollutant and no side product, and is suitable for application in large scale industrial production. The new material is capable of becoming environmentally friendly important chemical material.

Description

(1) Technical field [0001] The invention relates to an ionic liquid and a preparation method thereof, in particular to a novel L-amino acid bisulfate-type chiral ionic liquid and a preparation method of the chiral ionic liquid, which belong to the technical field of new chemical materials and their preparation. (2) Background technology [0002] In recent years, ionic liquids have attracted widespread attention as green solvents or catalysts. They are commonly used in some chemical reactions such as organic synthesis, chemical separation, and electrochemistry, and have dual-functional characteristics of solvents and catalysts. Li Ruxiong et al. mentioned in "Chemical Reagents", 2001, 23 (4), pages 211-215, "Synthesis and Application of Ionic Liquids", that there are currently 4 types of cations in ionic liquids: alkyl quaternary ammonium ions, Alkyl quaternary phosphine ions, alkyl imidazolium ions, alkyl pyridinium ions; anions mainly include Cl - 、Br - , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04C07C227/16
Inventor 单永奎戴立益叶生荣何鸣元
Owner EAST CHINA NORMAL UNIV
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