Cesium carbonate → HCID 135955928, compound

HRID 1718250Notes

Reaction equation

HRID 1718250 reaction equation
[CH2:1]([C:8]1[C:9](=[O:18])[NH:10][C:11]([O:15][CH2:16][CH3:17])=[N:12][C:13]=1[CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Br[CH2:20][C:21]1[CH:26]=[CH:25][C:24]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=2[C:33]2[N:37]=[C:36](C(Cl)(Cl)Cl)[O:35][N:34]=2)=[CH:23][CH:22]=1.C(=O)([O-])[O-:43].[Cs+].[Cs+]>CN(C)C=O.C(OCC)(=O)C>[CH2:1]([C:8]1[C:9](=[O:18])[N:10]([CH2:20][C:21]2[CH:26]=[CH:25][C:24]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=3[C:33]3[NH:37][C:36](=[O:43])[O:35][N:34]=3)=[CH:23][CH:22]=2)[C:11]([O:15][CH2:16][CH3:17])=[N:12][C:13]=1[CH3:14])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 15290996HCID 15290996, compoundHCID 136026728HCID 136026728, compound

Product 1

HCID 135955928HCID 135955928, compoundYield 20.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 5-benzyl-2-ethoxy-6-methylpyrimidin-4(3H)-one (0.27 g) and 3-[4′-(bromomethyl)biphenyl-2-yl]-5-(trichloromethyl)-1,2,4-oxadiazole (0.58 g) in N,N-dimethylformamide (5 mL) was added cesium carbonate (0.44 g), and the mixture was stirred for 12 hr. The reaction mixture was diluted with ethyl acetate, washed with 1 M hydrochloric acid and saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in tetrahydrofuran-ethanol (1:1, 4 mL), 1 M sodium hydroxide (2 mL) was added and the mixture was stirred for 30 min. The reaction mixture was weakly acidified with 1 M hydrochloric acid and extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to give the title compound (0.11 g, 20%) as a colorless solid.

Workup

  1. washwashed with 1 M hydrochloric acid and saturated brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. customThe solvent was evaporated under reduced pressure
  4. dissolutionThe residue was dissolved in tetrahydrofuran-ethanol (1:1, 4 mL)
  5. addition1 M sodium hydroxide (2 mL) was added
  6. stirringthe mixture was stirred for 30 min
  7. extractionextracted with ethyl acetate
  8. washThe organic layer was washed with saturated brine
  9. dry with materialdried over anhydrous sodium sulfate
  10. customThe solvent was evaporated under reduced pressure
  11. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-ae77e89eebdb4722b9a9e73dcfa94bf2
Source dataset
uspto-grants-2010_09
Patent number
US07803940B2

Reaction notes

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