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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 2221399
Notes
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Reaction equation

HRID 2221399 reaction equation
CN(C)C=O.[N+:6]([C:9]1[N:10]=[C:11](SC2C=CC([N+]([O-])=O)=CC=2)[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>ClCCl.C(OCC)(=O)C.CO.C(OCC)(=O)C>[CH3:39][C@@:15]1([CH2:16][N:17]2[CH2:18][CH2:19][N:20]([C:23]([O:25][CH2:26][CH:27]=[CH:28][C:29]3[CH:34]=[CH:33][C:32]([C:35]([F:36])([F:38])[F:37])=[CH:31][CH:30]=3)=[O:24])[CH2:21][CH2:22]2)[O:40][C:11]2=[N:10][C:9]([N+:6]([O-:8])=[O:7])=[CH:13][N:12]2[CH2:14]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 962WaterHCID 6228DimethylformamideHCID 23676156Sodium t-butoxideHCID 866043693-(4-Trifluoromethylphenyl)-2-propenyl(s)-4-{3-[4-nitro-2-(4-nitrophenylthio)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-carboxylate
Yield 54%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 21901258Dichloromethane ethyl acetate methanolSolvent

Procedure

To N,N-dimethylformamide (1 ml) solution of 3-(4-trifluoromethylphenyl)-2-propenyl (S)-4-{3-[4-nitro-2-(4-nitrophenylthio)imidazol-1-yl]-2-hydroxy-2-methylpropyl}piperazin-1-carboxylate (100 mg) was added sodium tert-butoxide (19 mg) at 0° C., and stirred at the same temperature for 20 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 basic silica gel chromatography (eluent: dichloroethane/ethyl acetate=9/1) and a slica gel column chromatography (eluent: dichloromethane/ethyl acetate/methanol=20/20/1), 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 (40 mg, yield: 54%) as 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 basic silica gel chromatography (eluent: dichloroethane/ethyl acetate=9/1)

Sources & evidence

ORD record
ord-20bd4cb7bdd04c66b607ecb63822aaca
Source dataset
uspto-grants-2008_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07368579B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes