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Synthesis method of bagasse xylan gallic acid trimesic acid diesterified derivative

A technology of gallate and benzenetricarboxylic acid, which is applied in the field of polymer materials, can solve the problems of limited anti-biological activity, and achieve the effect of easy control of process conditions and high biological activity

Inactive Publication Date: 2019-02-12
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that xylan gallate has antibacterial and anti-HIV activities, but only one antibiologically active group is introduced into monoesterified xylan gallate, which makes its antibiological activity limited

Method used

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  • Synthesis method of bagasse xylan gallic acid trimesic acid diesterified derivative
  • Synthesis method of bagasse xylan gallic acid trimesic acid diesterified derivative
  • Synthesis method of bagasse xylan gallic acid trimesic acid diesterified derivative

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Experimental program
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Embodiment

[0046](1) Weigh 10 g of gallic acid and add it to a 250 mL four-necked flask, and add 20 mL of analytically pure acetic anhydride and 13 mL of analytically pure pyridine to it, control the temperature of the ice bath at 20° C., and react for 8 hours under stirring. Add 22mL of hydrochloric acid solution with a mass fraction of 20%, stir evenly, and precipitate a white precipitate of crude triacetylgallic acid.

[0047] (2) The crude product of triacetyl gallic acid obtained in the suction filtration step (1), and the precipitate was fully washed with 10 mL of distilled water for 3 times and then suction filtered, and the filter cake was sent to a 50° C. vacuum constant temperature drying oven for drying for 24 hours to constant weight to obtain triacetyl gallnut acid.

[0048] (3) Weigh 6g of triacetyl gallic acid obtained in step (2) into a 250mL four-neck flask, and add 30mL of analytically pure cyclohexane and 20mL of analytically pure N,N-dimethylformamide into it, and sti...

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Abstract

The invention discloses a synthesis method of a bagasse xylan gallic acid trimesic acid diesterified derivative. Bagasse xylan is used as raw materials; N, N-dimethylformamide is used as a solvent; ammonium persulfate is used as a catalyst; firstly, catalytic esterification reaction is performed with triacetyl gallate chloride to synthesize the bagasse xylan gallate; then, in the N, N-dimethylformamide solvent, with the existence of dewatering agents of N, N-dicyclohexylcarbodiimide, second step of catalytic esterification reaction is performed with trimesic acid under the catalysis effect ofcobalt naphthenate; the bagasse xylan gallic acid trimesic acid diesterified derivative is synthesized. The bagasse xylan diesterified derivative has the dual activity of the bagasse xylan gallate andthe bagasse xylan trimesic acid ester. The dual-active bagasse xylan derivative subjected to chemical modification has certain effects in aspects of anti-HIV activity, anticoagulant activity, platelet aggregation resistance and the like; high application values are realized in the fields of medicine, food, fine chemical engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a method for synthesizing a bagasse xylan gallic acid trimellitic acid diester derivative. Background technique [0002] Xylan is abundant in plant resources such as corncobs, bagasse, cottonseed husks, rice husks, wheat straw, camellia husks, and birch. In order to expand the application range of xylan, researchers have modified xylan by various chemical methods, which can not only overcome the defect of poor water solubility of xylan itself, but also enhance some of the original chemical properties of xylan and physiological activity, and even expand the properties and biological activities that xylan itself does not have. [0003] The chemical modification of bagasse xylan mainly occurs at the relatively active C2 and C3 hydroxyl positions, and the structural modification methods mainly include esterification, oxidation, etherification, grafting and carboxymethylati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/14
CPCC08B37/0057
Inventor 李和平武晋雄耿恺张海燕柴建啟张俊龚俊张淑芬
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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