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A kind of fluorine-containing thiophene derivative 3-(n-trifluoroacetylamino)thiophene and its synthesis method and application

A technology of trifluoroacetamido and thiophene derivatives, used in organic chemistry, coatings, etc., can solve the problems of poor anti-ultraviolet performance, easy yellowing and aging, and achieve low water vapor transmission and anti-yellowing ability. Strong and hydrophobic effect

Active Publication Date: 2021-02-02
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, PVDC emulsions and composites coated with PVDC emulsions have poor UV resistance, and are prone to yellowing and aging under long-term sunlight exposure. Therefore, it is necessary to study suitable additives to further improve the performance of PVDC emulsions.

Method used

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  • A kind of fluorine-containing thiophene derivative 3-(n-trifluoroacetylamino)thiophene and its synthesis method and application
  • A kind of fluorine-containing thiophene derivative 3-(n-trifluoroacetylamino)thiophene and its synthesis method and application
  • A kind of fluorine-containing thiophene derivative 3-(n-trifluoroacetylamino)thiophene and its synthesis method and application

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Embodiment 1

[0019] The preparation process of 3-(N-trifluoroacetylamino)thiophene of the present invention is:

[0020] 9.92g (0.1mol) 3-aminothiophene oxalate is dissolved in 128ml (2mol) methylene chloride solution, under the effect of 25.30g (0.25mol) triethylamine, obtains the 3-aminothiophene of free state, then will The reaction solution was cooled to 0°C, and 25.2 g (0.12 mol) of trifluoroacetic anhydride was slowly added dropwise. After reacting at room temperature for 2 hours, a saturated sodium bicarbonate solution was added until no bubbles were generated to obtain a mixed solution;

[0021] The mixed solution after the above reaction was extracted 3 times with ethyl acetate, and the organic phases were combined, and the organic phase was washed 3 times with saturated sodium chloride solution, dried by adding anhydrous sodium sulfate, suction filtered, and the solvent was rotary evaporated to obtain 3-( Crude N-trifluoroacetylamino)thiophene. The obtained 3-(N-trifluoroacetyla...

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Abstract

The invention discloses a fluorine-containing thiophene derivative 3‑(N‑trifluoroacetylamino)thiophene, a synthesis method and an application thereof. Described 3-(N-trifluoroacetylamino)thiophene is shown in formula 1, and the preparation method is: dissolving 3-aminothiophene oxalate in dichloromethane, and under the action of triethylamine, obtains the free state 3‑aminothiophene, then cool the reaction solution to 0°C, slowly add trifluoroacetic anhydride dropwise, react at room temperature for 8-10 hours, add saturated sodium bicarbonate solution until no bubbles are generated, and obtain a reaction mixture that is separated and purified to obtain 3‑(N‑trifluoroacetylamino)thiophene; the amount of the 3‑aminothiophene oxalate, triethylamine and trifluoroacetic anhydride is 1:1~5:1~3. The 3-(N-trifluoroacetylamino)thiophene of the present invention is applied to the preparation of composite emulsions.

Description

technical field [0001] The invention relates to a synthesis method of 3-(N-trifluoroacetylamino)thiophene and its fluorine-containing thiophene derivatives and their application as additives for polymer emulsions. Background technique [0002] Polyvinylidene chloride (PVDC) polymer material has a good ability to block water vapor and oxygen, and is widely used in packaging fields such as food preservation film and pharmaceutical packaging materials. At present, PVDC emulsion is widely used in the field of food and pharmaceutical packaging. Coating PVDC emulsion on PVC, PET, PCT and other materials can significantly improve the barrier properties of these materials. However, PVDC emulsions and composites coated with PVDC emulsions have poor UV resistance, and are prone to yellowing and aging under long-term sunlight exposure. Therefore, it is necessary to study suitable additives to further improve the performance of PVDC emulsions. Contents of the invention [0003] The t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D333/36C09D7/63C09D127/08
CPCC07D333/36C09D127/08C09D7/63C08K5/45
Inventor 吕耀康王虎李建杭杨德明
Owner ZHEJIANG UNIV OF TECH
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