7,10-dibromodibenzo[f,h]quinoxaline synthesis
- Product Name:7,10-dibromodibenzo[f,h]quinoxaline
- CAS Number:1012836-21-3
- Molecular formula:C16H8Br2N2
- Molecular Weight:388.06
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Yield:1012836-21-3 76%
Reaction Conditions:
Stage #1: ethylenediamine;3,6-dibromo-phenanthrene-9,10-dione in ethanol; for 8 h;Inert atmosphere;Reflux;
Stage #2: with acetic acid in ethanol; for 9 h;Inert atmosphere;Reflux;
Steps:
7.a
Under nitrogen 3.94g (65.6 mmol) of 1,2-diaminoethane was added 350ml of anhydrous ethanol 20.0g (54.6 mmol) of 3,5-dibromo-9,10-dioxo-phenanthrene in.The reaction mixture was refluxed for 8 hours.400ml of glacial acetic acid was added and reflux was continued for additional 9 hours under air.The reaction mixture was cooled to 25 , the product was filtered, washed with ethanol and dried under vacuum at 50 .The crude product was further soxhlet extracted with toluene to give a pale beige solid as the title compound (Yield: 16.0g (76%)).
References:
CN101970448,2016,B Location in patent:Paragraph 0371; 0372
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