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Chemical Structure| 801303-33-3 Chemical Structure| 801303-33-3

Structure of 801303-33-3

Chemical Structure| 801303-33-3

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Product Details of [ 801303-33-3 ]

CAS No. :801303-33-3
Formula : C9H9BrFNO2
M.W : 262.08
SMILES Code : O=C(N(OC)C)C1=CC=C(Br)C=C1F
MDL No. :MFCD09835098

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Application In Synthesis of [ 801303-33-3 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 801303-33-3 ]

[ 801303-33-3 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 2386-64-3 ]
  • [ 801303-33-3 ]
  • [ 259750-61-3 ]
  • 2
  • [ 925-90-6 ]
  • [ 801303-33-3 ]
  • [ 259750-61-3 ]
YieldReaction ConditionsOperation in experiment
Step B: 1-(4-Bromo-2-fluoro-phenyl)-propan-1-one Into a 1000-mL 4-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed a solution of 4-bromo-2-fluoro-N-methoxy-N-methylbenzamide (60 g, 229.01 mmol, 1.00 equiv) in tetrahydrofuran (200 mL). To the resulting mixture was then added ethylmagnesium bromide (2M) (185 mL, 1.60 equiv) dropwise with stirring at -20 C. The resulting solution was stirred for 2 h at room temperature, then cooled to 0 C. with a water/ice bath. The reaction was then quenched by the addition of NH4Cl/H2O (500 mL). The resulting solution was extracted with ethyl acetate (3*300 mL) and the organic layers combined. The resulting mixture was washed with water (1*300 mL) and brine (1*300 mL), then dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:20) to yield 1-(4-bromo-2-fluorophenyl)propan-1-one as a white solid.
In tetrahydrofuran; dichloromethane; at 0 - 20℃; for 2.0h; Compound 51: 1-(4-Bromo-2-fluoro-phenyl)-propan-1-one A solution of 4-bromo-2-fluorobenzoic acid (1.0 equiv.), N,O-dimethylhydroxylamine (1.2 equiv.), HOBt (1.2 equiv.), EDAC (1.2 equiv.) and diisopropylethylamine (4 equiv.) in DMA (0.40 mol.L- 1) was stirred at room temperature for 16 hours. The reaction mixture was hydrolyzed with aqueous sodium carbonate and extracted twice with EtOAc. The organic layers were combined, washed with brine, dried over MgSO4 and concentrated to dryness to give the Weinreb amide as a thick colorless oil. The amide was dissolved in dichloromethane (0.5 mol.L-1) and cooled to 0C. Ethylmagnesium bromide (1M solution in THF, 1.3 equiv.) was added dropwise and the reaction mixture was stirred at room temperature for 2 hours. The reaction mixture was neutralized with citric acid (0.5 M) and extracted twice with diethyl ether. The organic layers were combined, washed with brine, dried over MgSO4 and concentrated. Purification by flash column chromatography on silica gel (0% to 20% EtOAc in cyclohexane) afforded the product as a colorless oil in 44% yield.1H-NMR (400 MHz, DMSO-D6): 7.77 (t, J 8.3 Hz, 1H, Ar); 7.73 (dd, J 10.7, 1.7 Hz, 1H, Ar); 7.56 (dd, J 8.3, 1.7 Hz, 1H, Ar); 2.96 (q, J 7.2 Hz, 2H, CH2-CH3); 1.07 (t, J 7.2 Hz, 3H, CH2-CH3). M/Z (M[79Br]+H)+ = 231.
  • 3
  • [ 801303-33-3 ]
  • [ 7746-27-2 ]
 

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