| Identification | Back Directory | [Name]
1-(5-Bromo-2,4-difluoro-phenyl)-ethanone | [CAS]
864773-64-8 | [Synonyms]
1-(5-Bromo-2,4-difluorophenyl)
5-broMo-2,4-difluoroacetophenobe
5'-Bromo-2',4'-difluoroacetophenone
5'-Bromo-2',4'-difluoroacetophenone 98%
1-(5-Bromo-2,4-difluoro-phenyl)-ethanone
1-(5-Bromo-2,4-difluorophenyl)ethan-1-one
Ethanone, 1-(5-bromo-2,4-difluorophenyl)- | [Molecular Formula]
C8H5BrF2O | [MDL Number]
MFCD13190613 | [MOL File]
864773-64-8.mol | [Molecular Weight]
235.03 |
| Chemical Properties | Back Directory | [Boiling point ]
254.0±40.0 °C(Predicted) | [density ]
1.614±0.06 g/cm3(Predicted) | [storage temp. ]
Sealed in dry,Room Temperature | [form ]
crystalline solid | [color ]
White |
| Hazard Information | Back Directory | [Uses]
1-(5-Bromo-2,4-difluoro-phenyl)-ethanone is a white powder crystal used in pharmaceutical synthesis and experimental research.
| [Synthesis]
1. in a dry reaction flask, anhydrous AlCl3 (1040 g, 7878.7 mmol) was added to 1-bromo-2,4-difluorobenzene (600 g, 3108.9 mmol) and stirred at 60 °C for 10 min.
2. acetyl chloride (366 g, 4662.4 mmol) was added slowly dropwise to the above mixture, maintaining the temperature at 60 °C for 4 hours.
3. after the dropwise addition was completed, the reaction mixture was continued to be stirred at 60 °C for 6 hours.
4. the reaction mixture was cooled to -10 °C and ice (2450 g) was added slowly, this process was controlled to be completed within 1.5 hours.
5. 12N HCl (1500mL) was added and stirred for 1 hour at room temperature.
6. EtOAc (9000mL) was added for extraction, the organic layer was separated, washed with water, dried over anhydrous Na2SO4 and filtered.
7. The organic phase was concentrated under pressure and the resulting residue was purified by silica gel column chromatography (eluent: petroleum ether/EtOAc, 50/1) to afford the target product 1-(5-bromo-2,4-difluorophenyl)ethanone (300 g, 41% yield). | [References]
[1] Patent: WO2011/154374, 2011, A1. Location in patent: Page/Page column 26
[2] Patent: WO2012/62751, 2012, A1. Location in patent: Page/Page column 41-42
[3] Patent: US2013/252952, 2013, A1. Location in patent: Paragraph 0167; 0168
[4] Patent: US2004/220194, 2004, A1. Location in patent: Page 44; 45
[5] Patent: US2005/239795, 2005, A1. Location in patent: Page/Page column 36 |
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