ChemicalBook CAS DataBase List 3,3',4,4'-Benzophenonetetracarboxylic dianhydride

3,3',4,4'-Benzophenonetetracarboxylic dianhydride synthesis

5synthesis methods

Product Name:3,3',4,4'-Benzophenonetetracarboxylic dianhydride
CAS Number:2421-28-5
Molecular formula:C17H6O7
Molecular Weight:322.23

2479-49-4 Synthesis

2479-49-4
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3,3',4,4'-Benzophenonetetracarboxylic dianhydride

2421-28-5
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$10.00/25g

Yield:2421-28-5 92.1%

Reaction Conditions:

with polyphosphoric acid in toluene at 100 - 110; for 6.5 h;Reagent/catalyst;Temperature;

Steps:

1.3; 2.3; 3.3

Step (3): add polyphosphoric acid (32g) and toluene (72g) into a 250mL three-necked flask,The intermediate (II) obtained in the above step is stirred under stirring(18.0g, 0.052mol) was added to the reaction solution,The internal temperature was adjusted to 100 to 110°C and stirred for 6.5 hours.Slowly cool down to 20 ~ 30 , filter,The filter cake was rinsed with toluene (30 g) and dried under vacuum at 80°C for 13 hours.14.9 g of yellow final product was obtained, with a purity of 98.9%,Step (3) Molar yield: 92.1%. The three-step total molar yield: 63.0%.

References:

CN114605363,2022,A Location in patent:Paragraph 0044-0045; 0053-0056; 0064-0067; 0075-0078

95-47-6 Synthesis