ChemicalBook CAS DataBase List 4,4'-Benzo[1,2-d:5,4-d']bisoxazole-2,6-benzenamine

4,4'-Benzo[1,2-d:5,4-d']bisoxazole-2,6-benzenamine synthesis

2synthesis methods

Product Name:4,4'-Benzo[1,2-d:5,4-d']bisoxazole-2,6-benzenamine
CAS Number:17200-77-0
Molecular formula:
Molecular Weight:0

Benzo[1,2-d:5,4-d']bisoxazole, 2,6-bis(4-nitrophenyl)- (9CI)

77316-48-4
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4,4'-Benzo[1,2-d:5,4-d']bisoxazole-2,6-benzenamine

17200-77-0
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Yield:17200-77-0 90%

Reaction Conditions:

with tetrafluoroboric acid in water at 100; pH=< 1; for 25 h;

Steps:

4 In the compound having the structure represented by the formula (I), R is a structure represented by the formula (6), and2,6-bis(4-nitrophenyl)benzobisoxazole.

At room temperature,Add 2,6-bis(4-nitrophenyl)benzobisoxazole (4.02 g, to a 100 mL ml single-necked flask, 0.01 mol) and 50 mL of water,Add tetrafluoroboric acid,Adjust the pH below 1.JoinSodium polysulfidesolid(7.8g, 0.10mol),Warming up to 100 ° C,Continuous reaction for 25h.After going to room temperature,filter,The filtrate was neutralized to a pH of 7 by adding a 25 wt% aqueous solution of sodium carbonate.The product precipitates from the reaction system,filter,Washed many times,dry,Obtained 3.1 g of the product 2,6-bis(4-aminophenyl)benzobisoxazole (yield 90%, purity (HPLC) >99.9%),

References:

CN108558770,2018,A Location in patent:Paragraph 0088; 0089; 0090

16523-31-2 Synthesis

16523-31-2
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$11.00/250mg

150-13-0 Synthesis

150-13-0
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$5.00/25g

17200-77-0
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References