Dimethylformamide → 3-(4-Trifluoromethylphenyl)-2-propenyl (S)-4-[3-(2-bromo-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]piperazine-1-carboxylate

HRID 2221404Notes

Reaction equation

HRID 2221404 reaction equation
[Br:1][C:2]1[N:3]([CH2:10][C@:11]2([CH3:14])[CH2:13][O:12]2)[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1.[N:15]1([C:21]([O:23][CH2:24][CH:25]=[CH:26][C:27]2[CH:32]=[CH:31][C:30]([C:33]([F:36])([F:35])[F:34])=[CH:29][CH:28]=2)=[O:22])[CH2:20][CH2:19][NH:18][CH2:17][CH2:16]1.CN(C)C=O>O>[Br:1][C:2]1[N:3]([CH2:10][C@:11]([OH:12])([CH3:14])[CH2:13][N:18]2[CH2:17][CH2:16][N:15]([C:21]([O:23][CH2:24][CH:25]=[CH:26][C:27]3[CH:32]=[CH:31][C:30]([C:33]([F:35])([F:36])[F:34])=[CH:29][CH:28]=3)=[O:22])[CH2:20][CH2:19]2)[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1

Participants

5

Reactant 3

HCID 6228DimethylformamideHCID 10467858(R)-2-bromo-4-nitro-1-(2-methyl-2-oxiranylmethyl)imidazoleHCID 665893003-(4-Trifluoromethylphenyl)-2-propenyl piperazine-1-carboxylate

Product 1

HCID 866043783-(4-Trifluoromethylphenyl)-2-propenyl (S)-4-[3-(2-bromo-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]piperazine-1-carboxylateYield 84%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
50 °C

Procedure

Mixture of (R)-2-bromo-4-nitro-1-(2-methyl-2-oxiranylmethyl)imidazole (2.04 g) prepared in example 6, 3-(4-trifluoromethylphenyl)-2-propenyl piperazin-1-carboxylate (2.69 g) and N,N-dimethylformamide (10 ml) was stirred at 50° C. for 20 hours. The reaction mixture was turned back to a room temperature, water (45 ml) was added, then extracted twice with ethyl acetate (15 ml). The organic layers were combined together, washed with water 3 times, dried over anhydrous sodium sulfate. Afer being filtrated under a reduced pressure, the residue thus obtained was purified by use of a silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/2), there was obtained 3-(4-trifluoromethylphenyl)-2-propenyl (S)-4-[3-(2-bromo-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]piperazin-1-carboxylate (3.77 g, yield: 84%)

Workup

  1. customwas turned back to a room temperature
  2. extractionextracted twice with ethyl acetate (15 ml)
  3. washwashed with water 3 times
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationAfer being filtrated under a reduced pressure
  6. customthe residue thus obtained
  7. customwas purified by use of a silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/2)

Sources & evidence

ORD record
ord-644234f2ba30455d8edc4ce99a00ae93
Source dataset
uspto-grants-2008_05
Patent number
US07368579B2

Reaction notes

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