Water → 2-Pyrazinecarboxylic acid, 5-(fluoromethoxy)-, methyl ester

HRID 217972Notes

Reaction equation

HRID 217972 reaction equation
C1(C)C=CC(S([O:10][CH2:11][F:12])(=O)=O)=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+].O[C:21]1[N:22]=[CH:23][C:24]([C:27]([O:29][CH3:30])=[O:28])=[N:25][CH:26]=1.O>CN(C)C=O>[F:12][CH2:11][O:10][C:21]1[N:22]=[CH:23][C:24]([C:27]([O:29][CH3:30])=[O:28])=[N:25][CH:26]=1

Participants

6

Reactant 4

HCID 962WaterHCID 10796Cesium carbonateHCID 13862289Fluoromethyl 4-methylbenzenesulfonateHCID 178498852HCID 178498852, compound

Product 1

HCID 574756772-Pyrazinecarboxylic acid, 5-(fluoromethoxy)-, methyl esterYield 11.5%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
70 °C

Procedure

Fluoromethyl toluene-4-sulfonate (Journal of Labelled Compounds & Radiopharmaceuticals, 46 (6), 555-566; 2003) (344 mg) and cesium carbonate (824 mg) were added to a solution of methyl 5-hydroxypyrazine-2-carboxylate (130 mg) in N,N-dimethylformamide (2.0 mL). The reaction solution was stirred at 70° C. for five hours and 30 minutes and then cooled to room temperature. Water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was concentrated under reduced pressure. The residue was purified by NH-silica gel column chromatography to obtain the title compound (18.0 mg).

Workup

  1. temperaturecooled to room temperature
  2. extractionfollowed by extraction with ethyl acetate
  3. concentrationThe organic layer was concentrated under reduced pressure
  4. customThe residue was purified by NH-silica gel column chromatography

Sources & evidence

ORD record
ord-44b5b74baca348a78963953d6cc0283d
Source dataset
uspto-grants-2012_06
Patent number
US08198269B2

Reaction notes

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