Imidazole → HCID 19434937, compound

HRID 1736201Notes

Reaction equation

HRID 1736201 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([F:36])[C:5]2[O:10][C:9]([C:11]3[CH:16]=[CH:15][C:14]([NH:17][C:18](=[O:23])[C:19]([CH3:22])([CH3:21])[CH3:20])=[C:13]([F:24])[CH:12]=3)=[CH:8][C:7](=[O:25])[C:6]=2[C:26]=1[NH:27][CH2:28][CH2:29][CH2:30]OS(C)(=O)=O.[NH:37]1[CH:41]=[CH:40][N:39]=[CH:38]1.[H-].[Na+].O>CN(C)C=O>[F:1][C:2]1[CH:3]=[C:4]([F:36])[C:5]2[O:10][C:9]([C:11]3[CH:16]=[CH:15][C:14]([NH:17][C:18](=[O:23])[C:19]([CH3:22])([CH3:20])[CH3:21])=[C:13]([F:24])[CH:12]=3)=[CH:8][C:7](=[O:25])[C:6]=2[C:26]=1[NH:27][CH2:28][CH2:29][CH2:30][N:37]1[CH:41]=[CH:40][N:39]=[CH:38]1

Participants

6

Reactant 4

HCID 795ImidazoleHCID 962WaterHCID 24758Sodium hydrideHCID 19435004HCID 19435004, compound

Product 1

HCID 19434937HCID 19434937, compoundYield 88%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

719 mg (1.37 mmol) of the above 6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-5-(3-methanesulfonyloxypropylamino)-4H-1-benzopyran-4-one was dissolved in 30 mL of dimethylformamide under argon atmosphere, 932 mg (13.7 mmol) of imidazole and 657 mg (16.4 mmol) of sodium hydride (60% oil dispersion) were added and the mixture was stirred for 4.5 hours. Water was added to the reaction solution and the mixture was extracted once with ethyl acetate. The organic layer was washed with an aqueous saturated solution of sodium chloride and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and the residue was purified by silica gel column chromatography (chloroform:methanol=100:l) to give 600 mg of 6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-5-[3-(imidazol-1-yl)propylamino]-4H-1-benzopyran-4-one (yield: 88%).

Workup

  1. extractionthe mixture was extracted once with ethyl acetate
  2. washThe organic layer was washed with an aqueous saturated solution of sodium chloride
  3. dry with materialdried over anhydrous sodium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customthe residue was purified by silica gel column chromatography (chloroform:methanol=100:l)

Sources & evidence

ORD record
ord-a0966c8e2a4f453cb1e047bcb1a2c5e3
Source dataset
uspto-grants-1996_07
Patent number
US05539112

Reaction notes

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