HEXAFLUOROGLUTARIC ANHYDRIDE synthesis
- Product Name:HEXAFLUOROGLUTARIC ANHYDRIDE
- CAS Number:376-68-1
- Molecular formula:C5F6O3
- Molecular Weight:222.04
Yield:-
Reaction Conditions:
Stage #1:1,2-dichloro-3,3,4,4,5,5-hexafluorocyclopentene with potassium permanganate;sodium hydroxide; pH=9
Stage #2: with 1H-imidazole;oxalyl dichloride;18-crown-6 ether in dichloromethane at 25; for 2.5 h;
Steps:
4
Add the above mixed salt, 6g imidazole, 10g crown ether (18-crown-6) and 500g dichloromethane together into a 5L three-necked flask with mechanical stirring, constant pressure dropping funnel and thermometer catheter.Under stirring conditions, 600 g of oxalyl chloride was dropped into the flask through a constant pressure dropping funnel, and the internal temperature was controlled at about 25°C. The exhaust gas is absorbed by lye.After the addition was completed in 2h, stirring was continued for 0.5h to end the reaction. A dry ice alcohol cold trap was used to collect the distilled products under reduced pressure (80, ≤20mmHg), and the corresponding contents of hexafluoroglutarate and hexafluoroglutaric anhydride were 64.3% and 34.9% by GC analysis.
References:
Zhong Lan Chenguang Chemical Design Yuan Co., Ltd.;Luo Kai;Luo Shengqiao;Chen Binbin;Dou Ruoan;Hu Jun;Gan Libing;Lai Bihong CN111333501, 2020, A Location in patent:Paragraph 0037-0038
376-73-8
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$30.00/10 g
376-68-1
104 suppliers
$15.00/5 g
678-77-3
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$26.19/1g
376-68-1
104 suppliers
$15.00/5 g