4,4'-(Hexafluoroisopropylidene)diphthalic anhydride synthesis
- Product Name:4,4'-(Hexafluoroisopropylidene)diphthalic anhydride
- CAS Number:1107-00-2
- Molecular formula:C19H6F6O6
- Molecular Weight:444.24
3016-76-0
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1107-00-2
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Yield:1107-00-2 96%
Reaction Conditions:
with acetic anhydride at 120; for 4 h;Temperature;
Steps:
1.2; 15-16; 1-2
Add hexafluorotetraacid to 40ml of anhydrous acetic anhydride, stir and reflux at 120°C for 4h, the molar ratio of hexafluorotetraacid to anhydrous acetic anhydride is 1:3.5. The reaction solution was cooled by an ice-water bath to precipitate white crystals, and after drying, the crude hexafluorodianhydride was obtained with a purity of 98%.The crude hexafluorodianhydride was added to 20ml of anhydrous trifluoroacetic anhydride and mixed, and then heated to reflux at 35°C for 1.5h. The molar ratio of crude hexafluorodianhydride to anhydrous trifluoroacetic anhydride was 1:1.5. The reaction solution was cooled by an ice-water bath to precipitate white crystals, and after drying, the finished product of hexafluorodianhydride was obtained with a purity of 99.8%. The yield of S2 step was 96%.
References:
CN113480504,2021,A Location in patent:Paragraph 0026; 0030-0031; 0045-0046; 0047-0048; 0049; 0051
65294-20-4
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1107-00-2
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108-24-7
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$14.00/250ML
65294-20-4
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1107-00-2
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![Phenol, 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis[2-nitro-](/CAS/20180531/GIF/73340-33-7.gif)
73340-33-7
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1107-00-2
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83558-87-6
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1107-00-2
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