ChemicalBook CAS DataBase List Bismaleimide

Bismaleimide synthesis

9synthesis methods

Product Name:Bismaleimide
CAS Number:13676-54-5
Molecular formula:C21H14N2O4
Molecular Weight:358.35

108-31-6 Synthesis

108-31-6
822 suppliers
$13.47/50g

101-77-9 Synthesis

101-77-9
340 suppliers
$15.00/25g

13676-54-5
317 suppliers
$5.00/5g

Yield:13676-54-5 92.1%

Reaction Conditions:

with acetic anhydride;acetic acid at 100; for 0.25 h;Microwave irradiation;Temperature;

Steps:

1; 2 Example 2 A method for synthesizing diphenylmethane bismaleimide was carried out as follows:

Maleic anhydride (9.8 g, 100 mmol, 99.0%),4,4'-diaminodiphenylmethane (9.9 g, 50 mmol),Acetic anhydride (12.3 g, 120 mmol),Glacial acetic acid (60g, 99%)Placed in a 100mL microwave reaction tube,After being dissolved, put it into the microwave reactor.Set the reaction temperature to 100 ° C,The reaction time is 15 minutes.Turn on the microwave reactor,Stir.After the reaction is completed, the reaction solution is transferred to a distillation apparatus.Atmospheric distillation,Collecting fraction acetic acid,After evaporation to dryness, 98 g of ethanol was added.Turning back to the condensing unit,Reflux for 10 minutes,cool down,Cool down to about 5 °C,Filtering,The obtained solid was dried under vacuum at 80 ° C for 2 hours to give 16.5 g of pale yellow solid.The target compound diphenylmethane bismaleimide,Its purity is 98.5% (HPLC),The yield is 92.1%.

References:

CN109400516,2019,A Location in patent:Paragraph 0024-0029