Water → 5-amino-2-[4-[N-(tert-butoxycarbonyl)-N-methoxymethylamino]-3-fluorophenyl)-6,8-difluoro-4H-1-benzopyran-4-one

HRID 1736213Notes

Reaction equation

HRID 1736213 reaction equation
[NH2:1][C:2]1[C:7]2[C:8](=[O:27])[CH:9]=[C:10]([C:12]3[CH:17]=[CH:16][C:15]([NH:18][C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])=[C:14]([F:26])[CH:13]=3)[O:11][C:6]=2[C:5]([F:28])=[CH:4][C:3]=1[F:29].[H-].[Na+].[CH3:32][O:33][CH2:34]Cl.O>CN(C)C=O>[NH2:1][C:2]1[C:7]2[C:8](=[O:27])[CH:9]=[C:10]([C:12]3[CH:17]=[CH:16][C:15]([N:18]([C:19]([O:21][C:22]([CH3:25])([CH3:23])[CH3:24])=[O:20])[CH2:32][O:33][CH3:34])=[C:14]([F:26])[CH:13]=3)[O:11][C:6]=2[C:5]([F:28])=[CH:4][C:3]=1[F:29]

Participants

6

Reactant 4

HCID 962WaterHCID 7864Chloromethyl Methyl EtherHCID 24758Sodium hydrideHCID 19434972HCID 19434972, compound

Product 1

HCID 194347945-amino-2-[4-[N-(tert-butoxycarbonyl)-N-methoxymethylamino]-3-fluorophenyl)-6,8-difluoro-4H-1-benzopyran-4-oneYield 92.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

2.41 g (5.94 mmol) of Compound 51 obtained in Example 51 was dissolved in 60 mL of dimethylformamide under argon atmosphere, 237 mg (5.94 mmol) of sodium hydride (60% oil dispersion) and 0.47 mL (6.24mmol) of chloromethyl methyl ether were added under ice-cooling and the mixture was stirred at room temperature for 40 minutes. The reaction solution was cooled on ice, water was added and the mixture was extracted with ethyl acetate. The organic layer was washed once with water and once 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:acetonitrile=30:l) to give 2.47 g of 5-amino-2-[4-[N-(tert-butoxycarbonyl)-N-methoxymethylamino]-3-fluorophenyl)-6,8-difluoro-4H-1-benzopyran-4-one (yield: 92%).

Workup

  1. temperaturecooling
  2. additionwas added
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed once with water and once 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 (chloroform:acetonitrile=30:l)

Sources & evidence

ORD record
ord-c0e8acb201bd4856b7cb9f8981df71ef
Source dataset
uspto-grants-1996_07
Patent number
US05539112

Reaction notes

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