ChemicalBook CAS DataBase List 4,7-Bis(5-broMothiophen-2-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole

4,7-Bis(5-broMothiophen-2-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole synthesis

13synthesis methods

Product Name:4,7-Bis(5-broMothiophen-2-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole
CAS Number:1304773-89-4
Molecular formula:C14H4Br2F2N2S3
Molecular Weight:494.19

1304773-88-3 Synthesis

5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole

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4,7-Bis(5-broMothiophen-2-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole

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Yield: 84%

Reaction Conditions:

with N-Bromosuccinimide in 1,2-dichloro-benzene at 55; for 3 h;

Steps:

1.5
Step 5: Synthesis of 5,6-difluoro-4,7-di(5-bromo-2-thienyl)-2,1,3-benzothiadiazole5,6-difluoro-4,7-di(2-thienyl)-2,1 ,3-benzothiadiazole (1.07 g, 3.18 mmol), N- bromosuccinimide (1.132 g, 6.36 mmol) and o-dichloroenzene (20 ml) were stirred at 55°C for 3 h. Then o-dichlorobenzene was removed by vacuum distillation and the remaining solid was washed with ethanol and water before further purification by recrystallization from toluene (45 ml) to afford yellow crystals of 5,6-difluoro-4,7-di(5- bromo-2-thienyl)-2, 1 ,3-benzothiadiazole (Monomer 2) (1.32 g, 84%). H and ¹⁹F NMR spectra were as expected.

References:

NATIONAL RESEARCH COUNCIL OF CANADA;Ll, Zhao;DING, Jianfu;LU, Jianping;TAO, Ye WO2011/60526, 2011, A1 Location in patent:Page/Page column 9

1293389-28-2
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References

5,6-difluoro-4,7-diiodobenzo[c][1,2,5]thiadiazole

1293389-29-3
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$102.84/25G

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References

156682-52-9 Synthesis

156682-52-9
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References

1,4-dibroMo-2,3-difluoro-5,6-dinitrobenzene

1283598-32-2
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References