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Method for extracting eleocharin E from eleocharis tuberose peel

A technology of water chestnut pentaphyllum and water chestnut peel, which is applied in directions such as organic chemistry and achieves good application prospects, high product purity and good separation effect.

Inactive Publication Date: 2015-05-13
HEZHOU UNIV
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After searching for Chinese published patents, no technical solution identical to this patent application was found

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  • Method for extracting eleocharin E from eleocharis tuberose peel
  • Method for extracting eleocharin E from eleocharis tuberose peel
  • Method for extracting eleocharin E from eleocharis tuberose peel

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0019] The method of the present invention is characterized in that: apply conventional extraction method and MCI, polyamide, gel and semi-preparative high-performance liquid chromatography technology to extract and separate water chestnut flavonoid monomer from water chestnut skin, and its concrete steps are as follows:

[0020] (1) Air-dry the fresh water chestnut skin, crush it, and set aside. Weigh a certain mass (g) of water chestnut skin powder and add it to the extraction tank, then add 4-10 times the volume (mL) of 70% volume percent acetone aqueous solution, soak at 25°C for 24 hours, soak for 3 times, filter, and combine the filtrates , concentrated under reduced pressure to a paste to obtain the extract.

[0021] (2) Disperse the extract (g) in 5 times the volume (mL) of water to make a suspension, extrac...

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Abstract

The invention discloses a method for extracting eleocharin E from eleocharis tuberose peel, and belongs to the field of natural organic chemicals. The method is characterized by comprising the following steps: taking an acetone solution as a solvent, extracting a crude extract by using ethyl acetate, separating by using medium-pressure MCI column chromatography and polyamide column chromatography, preparing by using Sephadex LH-20 gel and semi-preparative high performance liquid chromatography, and recrystallizing for assisting purification, so as to obtain a product with the purity greater than 95%. According to the method, the waste eleocharis tuberose peel is adopted as a raw material which is extracted and separated to obtain eleocharin E, so that the separation effect is good, the product purity is high, the eleocharis tuberose peel waste can be turned into wealthy, selected chromatography materials such as MCI, polyamide and gel can be repeatedly used, the raw material is easy to obtain, the resource is rich, the production cost is low, and relatively good application prospect can be achieved.

Description

technical field [0001] The invention belongs to the field of natural organic chemistry, and relates to a method for extracting and separating eocharin, in particular to a method for extracting and separating chocharin from water chestnut skin. Background technique [0002] Water chestnut (Eleocharis tuberosa), also known as horseshoe, belongs to the underground corm of the perennial shallow water herb water chestnut of Cyperaceae, which is cultivated in most parts of my country. Among them, the output of water chestnuts in Guangxi accounts for 70% of the country, and the output of water chestnuts in Hezhou accounts for 70% of Guangxi. According to literature reports, water chestnut has antibacterial, anti-tumor, prevention and treatment of respiratory diseases, intestinal laxative and diuretic drainage; it can be used clinically to treat sore throat, cough with phlegm heat, fever, polydipsia, dysuria, dysentery and other diseases. Studies have shown that the active substanc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/32C07D311/40
CPCC07D311/32C07D311/40
Inventor 罗杨合陈振林李行任杨军君钟飞雄
Owner HEZHOU UNIV