Water → 4-[4-(5-fluoro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-trifluoromethylpentyl]-3,4-dihydro-1H-quinoxalin-2-one

HRID 2105990Notes

Reaction equation

HRID 2105990 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]([O:19][CH3:20])=[C:6]([C:8]([CH3:18])([CH3:17])[CH2:9][C:10]2([C:13]([F:16])([F:15])[F:14])[CH2:12][O:11]2)[CH:7]=1.[NH:21]1[C:30]2[C:25](=[CH:26][CH:27]=[CH:28][CH:29]=2)[NH:24][CH2:23][C:22]1=[O:31].O>CN(C)C=O>[F:1][C:2]1[CH:3]=[CH:4][C:5]([O:19][CH3:20])=[C:6]([C:8]([CH3:18])([CH3:17])[CH2:9][C:10]([OH:11])([C:13]([F:16])([F:15])[F:14])[CH2:12][N:24]2[C:25]3[C:30](=[CH:29][CH:28]=[CH:27][CH:26]=3)[NH:21][C:22](=[O:31])[CH2:23]2)[CH:7]=1

Participants

5

Reactant 3

HCID 962WaterHCID 1859492(1H)-Quinoxalinone, 3,4-dihydro-HCID 160992392-[2-(5-Fluoro-2-methoxyphenyl)-2-methylpropyl]-2-trifluoromethyloxirane

Product 1

HCID 102526734-[4-(5-fluoro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-trifluoromethylpentyl]-3,4-dihydro-1H-quinoxalin-2-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 2-[2-(5-fluoro-2-methoxyphenyl)-2-methylpropyl]-2-trifluoromethyloxirane (105 mg) and 3,4-dihydro-1H-quinoxalin-2-one (R. E. TenBrink et al., J. Med. Chem., 1994, 37, pp. 758-768) (267 mg) in dimethylformamide (0.75 mL) was heated at 140° C. for 45 hours. The resulting mixture was poured into water and extracted twice with diethyl ether. The combined organic phases were washed with brine, dried over magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by column chromatography with silica gel (eluted with 30% ethyl acetate-hexanes) to give the title compound as a pale yellow solid (67.8 mg), m.p. 69° C.-71° C.

Workup

  1. extractionextracted twice with diethyl ether
  2. washThe combined organic phases were washed with brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by column chromatography with silica gel (eluted with 30% ethyl acetate-hexanes)

Sources & evidence

ORD record
ord-f4d44630327e4a58bf45e64ed4da1285
Source dataset
uspto-grants-2009_08
Patent number
US07579469B2

Reaction notes

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