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Chemical Structure| 294181-95-6 Chemical Structure| 294181-95-6

Structure of 294181-95-6

Chemical Structure| 294181-95-6

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Product Details of [ 294181-95-6 ]

CAS No. :294181-95-6
Formula : C9H8BrF2NO2
M.W : 280.07
SMILES Code : O=C(OCC)C(F)(C1=NC=C(Br)C=C1)F
MDL No. :MFCD12404043

Safety of [ 294181-95-6 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P280-P301+P312-P302+P352-P305+P351+P338

Application In Synthesis of [ 294181-95-6 ]

* 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 [ 294181-95-6 ]

[ 294181-95-6 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 294181-95-6 ]
  • [ 845827-13-6 ]
YieldReaction ConditionsOperation in experiment
40% With potassium fluoride; In water; N,N-dimethyl-formamide; at 170℃; for 24h;Schlenk technique; Inert atmosphere; According to the following procedure,5-Bromo-2-difluoromethylpyridine (Compound 4a) was prepared. In the Schlenk tube,The above-obtained 2- (5-bromopyridin-2-yl) -2,2-difluoroacetic acid ethyl ester (compound 3a) (224.1 mg, 0.8 mmol)Potassium fluoride (232.4 mg, 4.0 mmol) and water (72.1 mg, 4.0 mmol) were added and the mixture was stirred at 170 C. for 24 hours in a DMF solvent (3.2 mL) under a nitrogen atmosphere. After the reaction, 2,2,2-trifluoroethanol was added as an internal standard, As a result of 19 F-NMR measurement, it was found that 5-bromo-2-difluoromethylpyridine (compound 4a) was produced in a yield of 89%.After that, extraction with diethyl ether, washing with water,And dried over anhydrous sodium sulfate.Anhydrous sodium sulfate was removed by filtration,The filtrate was concentrated under reduced pressure.The residue was purified by silica gel column chromatography (Hexane: diethylether = 20: 1) 5-Bromo-2-difluoromethylpyridine (Compound 4a) (66.8 mg, 0.32 mmol, yield: 40%) was obtained.
 

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