1,4,5,8-Naphthalenetetracarboxylic dianhydride synthesis
- Product Name:1,4,5,8-Naphthalenetetracarboxylic dianhydride
- CAS Number:81-30-1
- Molecular formula:C14H4O6
- Molecular Weight:268.18
52671-72-4
128-97-2
81-30-1
General procedure: 100.0 g of a mixture consisting of 1,4,5,8-naphthalenetetracarboxylic acid and 1,4,5,8-naphthalenetetracarboxylic acid monoanhydride (mass ratio 86:14) was added to a 1000 mL three-necked flask with 200 mL of N,N-dimethylacetamide and 400 mL of toluene as solvent. The mixture was heated to 111 °C under nitrogen protection and the reaction was stirred at this temperature for 2 hours. After completion of the reaction, the reaction solution was cooled to 10 °C and stirring was continued for 1 hour. Subsequently, the precipitate was collected by filtration to afford 73 g of 1,4,5,8-naphthalenetetracarboxylic dianhydride.
52671-72-4
30 suppliers
$45.00/250mg
128-97-2
242 suppliers
$12.00/5g
81-30-1
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Yield:81-30-1 73 g
Reaction Conditions:
in N,N-dimethyl acetamide;toluene at 111; for 2 h;Inert atmosphere;Solvent;Temperature;
Steps:
6
Into a 1000 mL three-neck flask were added 100.0 g of a composition containing 1,4,5,8-naphthalenetetracarboxylic acid and 1,4,5,8-naphthalenetetracarboxylic acid monoanhydride with a mass ratio of 86:14 and the solvent made up of 200 mL of N,N-dimethylacetamide and 400 mL of toluene at room temperature in a nitrogen flow. After being heated up to 111° C., the materials in the flask were subjected to a reaction with stirring at that temperature for 2 hours. The flask was cooled to 10° C., and the sample was stirred for 1 hour and then filtered to yield 73 g of 1,4,5,8-naphthalenetetracarboxylic acid dianhydride.
References:
US2016/376285,2016,A1 Location in patent:Paragraph 0113
128-97-2
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81-30-1
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81-30-1
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30 suppliers
$45.00/250mg
81-30-1
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$6.00/5g
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81-30-1
257 suppliers
$6.00/5g