Water → 3-(4-trifluoromethylphenyl)-2-propenyl (S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazine-1-carboxylate

HRID 1092879Notes

Reaction equation

HRID 1092879 reaction equation
CN(C)C=O.[N+:6]([C:9]1[N:10]=[C:11](S(C2C=CC([N+]([O-])=O)=CC=2)(=O)=O)[N:12]([CH2:14][C@:15]([OH:40])([CH3:39])[CH2:16][N:17]2[CH2:22][CH2:21][N:20]([C:23]([O:25][CH2:26][CH:27]=[CH:28][C:29]3[CH:34]=[CH:33][C:32]([C:35]([F:38])([F:37])[F:36])=[CH:31][CH:30]=3)=[O:24])[CH2:19][CH2:18]2)[CH:13]=1)([O-:8])=[O:7].CC(C)([O-])C.[Na+].O>C(OCC)(=O)C>[CH3:39][C@@:15]1([CH2:16][N:17]2[CH2:22][CH2:21][N:20]([C:23]([O:25][CH2:26][CH:27]=[CH:28][C:29]3[CH:34]=[CH:33][C:32]([C:35]([F:37])([F:36])[F:38])=[CH:31][CH:30]=3)=[O:24])[CH2:19][CH2:18]2)[O:40][C:11]2=[N:10][C:9]([N+:6]([O-:8])=[O:7])=[CH:13][N:12]2[CH2:14]1

Participants

6

Reactant 4

HCID 962WaterHCID 6228DimethylformamideHCID 23676156Sodium t-butoxideHCID 866043753-(4-Trifluoromethylphenyl)-2-propenyl(s)-4-{3-[4-nitro-2-(4-nitrobenzenesulfonyl)imidazol-1-yl]-2-hydroxy-2-methylpropyl}piperazin-1-carboxylate

Product 1

HCID 866043773-(4-trifluoromethylphenyl)-2-propenyl (S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazine-1-carboxylateYield 39.8%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

To N,N-dimethylformamide (0.5 ml) solution of 3-(4-trifluoromethylphenyl)-2-propenyl(S)-4-{3-[4-nitro-2-(4-nitrobenzenesulfonyl)imidazol-1-yl]-2-hydroxy-2-methylpropyl}piperazin-1-carboxylate (45 mg) was added sodium tert-butoxide (8 mg) at 0° C., and stirred at the same temperature for 30 minutes. To the reaction mixture was added water and ethyl acetate, the organic layer was taken by separation. The ethyl acetate layer was washed with an aqueous solution of 5%-potassium carbonate, water, and an aqueous solution being saturated with sodium chloride, then dried over anhydrous sodium sulfate. The residue obtained by removal of the solvent by distillation was purified by use of a thin layer chromatography (eluent: dichloromethane/ethyl acetate/methanol=15/15/1), there was obtained 3-(4-trifluoromethylphenyl)-2-propenyl(S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo-[2,1-b]oxazol-2-ylmethyl)piperazin-1-carboxylate (13 mg, yield: 39%) as pale yellow amorphous product.

Workup

  1. customthe organic layer was taken by separation
  2. washThe ethyl acetate layer was washed with an aqueous solution of 5%-potassium carbonate, water
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe residue obtained by removal of the solvent by distillation
  5. customwas purified by use of a thin layer chromatography (eluent: dichloromethane/ethyl acetate/methanol=15/15/1)

Sources & evidence

ORD record
ord-3f1b9707201a4137a68516c475546508
Source dataset
uspto-grants-2012_03
Patent number
US08129544B2

Reaction notes

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