ChemicalBook CAS DataBase List 1,4,5,8-Naphthalenetetracarboxylic dianhydride

1,4,5,8-Naphthalenetetracarboxylic dianhydride synthesis

14synthesis methods

Product Name:1,4,5,8-Naphthalenetetracarboxylic dianhydride
CAS Number:81-30-1
Molecular formula:C14H4O6
Molecular Weight:268.18

1,4,5,8-Naphthalenetetracarboxylic acid 1,8-monoanhydride

52671-72-4
28 suppliers
$45.00/250mg

128-97-2
229 suppliers
$12.00/5g

1,4,5,8-Naphthalenetetracarboxylic dianhydride

81-30-1
239 suppliers
$6.00/5g

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
229 suppliers
$12.00/5g

81-30-1
239 suppliers
$6.00/5g

References

35147-76-3 Synthesis