Sodium hydride → 2-[4-[N-(tert-butoxycarbonyl)-N-methylamino]-3-fluorophenyl]-6,8-difluoro-5-(4-pentenylamino)-4H-benzopyran-4-one

HRID 1736148Notes

Reaction equation

HRID 1736148 reaction equation
[NH2:1][C:2]1[C:7]2[C:8](=[O:28])[CH:9]=[C:10]([C:12]3[CH:17]=[CH:16][C:15]([N:18]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH3:19])=[C:14]([F:27])[CH:13]=3)[O:11][C:6]=2[C:5]([F:29])=[CH:4][C:3]=1[F:30].[H-].[Na+].Br[CH2:34][CH2:35][CH2:36][CH:37]=[CH2:38].[Cl-].[NH4+]>CN(C)C=O>[C:23]([O:22][C:20]([N:18]([C:15]1[CH:16]=[CH:17][C:12]([C:10]2[O:11][C:6]3[C:5]([F:29])=[CH:4][C:3]([F:30])=[C:2]([NH:1][CH2:38][CH2:37][CH2:36][CH:35]=[CH2:34])[C:7]=3[C:8](=[O:28])[CH:9]=2)=[CH:13][C:14]=1[F:27])[CH3:19])=[O:21])([CH3:24])([CH3:25])[CH3:26]

Participants

6

Reactant 4

HCID 24758Sodium hydride2×HCID 25517Ammonium ChlorideHCID 707041-Pentene, 5-bromo-2×HCID 19434922HCID 19434922, compound

Product 1

HCID 194347972-[4-[N-(tert-butoxycarbonyl)-N-methylamino]-3-fluorophenyl]-6,8-difluoro-5-(4-pentenylamino)-4H-benzopyran-4-oneYield 24%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

852 mg (2.03mmol) of the resulting 5-amino-2-[4-[N-(tert-butoxycarbonyl)-N-methylamino]-3-fluorophenyl]-6,8-difluoro-4H-1-benzopyran-4-one was dissolved in 30 ml of dimethylformamide under argon atmosphere, 165 mg of sodium hydride (60% oil dispersion) and 0.48 ml of 5-bromo-1-pentene were added under ice-cooling and the mixture was stirred at room temperature for 2 hours. 85 mg of sodium hydride (60% oil dispersion) and 0.24 ml of 5-bromo-1-pentene were added and the mixture was stirred for additional 1 hour. An aqueous saturated solution of ammonium chloride was added to the reaction solution and the mixture was extracted twice with ethyl acetate. The organic layer was washed with an aqueous saturated solution of sodium chloride and dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=7:1) to give 239 mg (24%) of 2-[4-[N-(tert-butoxycarbonyl)-N-methylamino]-3-fluorophenyl]-6,8-difluoro-5-(4-pentenylamino)-4H-benzopyran-4-one.

Workup

  1. temperaturecooling
  2. stirringthe mixture was stirred for additional 1 hour
  3. extractionthe mixture was extracted twice with ethyl acetate
  4. washThe organic layer was washed with an aqueous saturated solution of sodium chloride
  5. dry with materialdried over anhydrous sodium sulfate
  6. distillationthe solvent was distilled off under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=7:1)

Sources & evidence

ORD record
ord-e3f798de462342c78cbfb06c2ad07d35
Source dataset
uspto-grants-1996_07
Patent number
US05539112

Reaction notes

Loading…