Novel 1,2-cis-xyloside surfactant

An active agent, xyloside technology, applied in the field of sugar-based surfactants, alkoxyethyl-α-D-xylopyranoside surfactants, can solve the problem of water solubility and surface activity, and it is difficult to achieve surface activity The application value of the agent, the decrease of water solubility, etc., can achieve the effect of optional controllable foaming performance and emulsification performance, good market prospect and application value, and improvement of water solubility

Inactive Publication Date: 2017-06-23
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] From the structural analysis, no matter compared with the alkyl-D-glucopyranoside of the 1,2-cis structure or the 1,2-trans structure, the alkyl-D-xylopyranoside (whether it is 1, 2-cis structure or 1,2-trans structure) In view of the lack of hydroxymethyl group, the water solubility is significantly reduced. It is developed as a surfactant in a manner similar to alkyl-D-glucopyranoside. Its water solubility is similar to that of Surface activity cannot or is difficult to reach the level of application value as a surfactant (Journal of Central South University (Natural Science Edition), 2016, 47(10): 3323-3331), which has become a bottleneck for industrial R&D and commercial development

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  • Novel 1,2-cis-xyloside surfactant
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  • Novel 1,2-cis-xyloside surfactant

Examples

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preparation example Construction

[0025] On the basis of providing alkoxyethyl-α-D-xylopyranoside with novel structure, the present invention also provides a preparation method, comprising the following steps:

[0026] (1) In the presence of a catalyst, D-xylose is contacted with a protecting agent to obtain acyl-protected D-xylose;

[0027] (2) In the presence of a catalyst, contact the acyl-protected D-xylose obtained in step (1) with ethylene glycol monoalkyl ether to obtain a 1,2-cis coupling product acyl-protected alkoxy Ethyl-α-D-xylopyranoside;

[0028] (3) In the presence of a catalyst, the 1,2-cis acyl-protected alkoxyethyl-α-D-xylopyranoside obtained in step (2) is subjected to deacyl protection to obtain 1,2- The structure of cis-alkoxyethyl-α-D-xylopyranoside is shown in formula (I).

[0029]

[0030] According to a preferred embodiment of the present invention, in step (1), the catalyst is anhydrous sodium acetate, and the protective agent is acetic anhydride, and the following reaction formu...

example 1

[0046] Example 1: Preparation of Hexyloxyethyl-α-D-xylopyranoside

[0047] (1) Add 0.13mol of dried D-xylose, 0.67mol of acetic anhydride, and 36.59mmol of anhydrous sodium acetate to a 250mL three-necked flask in turn, install a reflux condensing device, stir mechanically, and heat up with an electric heating mantle to make the solid slightly After dissolving, remove the heating device and continue to stir until all the solids are dissolved and become clear, then cool to room temperature. Then add 30mmol anhydrous sodium acetate, move the device into an oil bath, heat to reflux for 1h, TLC (developing agent: V 石油醚 :V 乙酸乙酯 =1:1) Monitor the complete reaction, pour the reaction solution into 400mL of ice water while it is hot and stir, then precipitate a large amount of solid, filter with suction, and wash the filter cake with distilled water several times to obtain 35.02g of acetyl-protected D-xylose, producing The rate is 82.6%. With methanol solution (V 甲醇 :V 水 =1:2) re...

example 2

[0051] Example 2: Preparation of Heptyloxyethyl-α-D-xylopyranoside

[0052] (1) With step (1) in embodiment 1.

[0053] (2) In a 250mL round bottom flask, add 31.42mmol of the acetyl-protected D-xylose obtained in step (1), dissolve with an appropriate amount of dichloromethane, then add 47.16mmol of ethylene glycol monoheptyl ether, and Boron trifluoride diethyl ether 0.16mol was added dropwise under the bath, magnetically stirred for 9 hours, TLC (developing solvent: V 石油醚 :V 乙酸乙酯 =5: 1) The detection reaction is complete, the mixed solution is washed successively with saturated aqueous sodium bicarbonate solution and saturated saline solution, dried with anhydrous sodium sulfate, filtered, the filtrate is concentrated, and column chromatography (V 石油醚 :V 乙酸乙酯 =10: 1) separation to obtain 5.26 g of heptyloxyethyl-2,3,4-tri-O-acetyl-α-D-xylopyranoside with a yield of 40.0%. used directly in the next reaction.

[0054] (3) Add 12.57mmol of heptyloxyethyl-2,3,4-tri-O-acety...

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Abstract

The invention discloses a novel xylose-derived 1,2-cis glycoside surfactant and application thereof. 1,2-cis alkoxy ethyl-alpha-D-pyranxyloside is obtained from D-xylose through three steps of reactions, i.e., acylation, coupling and deprotection. According to the surfactant, D-xylose obtained from crop leftovers can be thoroughly converted, the production cost is low, the preparation method is simple, and the product is environmentally friendly. The glycoside is improved in water solubility, relatively high in surface activity and optional and controllable in foamability and emulsifying property and has good market prospect and economic value as a surfactant.

Description

technical field [0001] The invention belongs to the field of fine chemicals and relates to sugar-based surfactants, in particular to an alkoxyethyl-α-D-xylopyranoside surfactant and an application thereof. [0002] technical background [0003] Alkyl glycosides are produced by the dehydration of the hemiacetal hydroxyl groups of sugar compounds such as monosaccharides or disaccharides and the hydroxyl groups in alcohol molecules, and can be divided into 1,2-cis α-configuration and 1,2-trans The β-configurations of the formulas are widely present in nature. Studies have shown that their structures, physical and chemical properties including surface activity, and biological activities have their own advantages and disadvantages. It is necessary to develop their own anomers to facilitate the corresponding follow-up scientific research, product development and commercialization. [0004] With the unreasonable energy structure in our country, a large amount of exhaust gas has bee...

Claims

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Application Information

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IPC IPC(8): C07H15/04C07H1/00B01F17/56C09K23/56
CPCC07H1/00C07H15/04C09K23/00
Inventor 陈朗秋申望珍
Owner XIANGTAN UNIV
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