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Water → Tert-butyl 4-(4-phenyl-1,3-thiazol-2-yl)piperazine-1-carboxylate

HRID 2262987
Notes
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Reaction equation

HRID 2262987 reaction equation
Cl[C:2]1[S:3][CH:4]=[C:5]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[N:6]=1.[C:13]([O:17][C:18]([N:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1)=[O:19])([CH3:16])([CH3:15])[CH3:14].C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[C:7]1([C:5]2[N:6]=[C:2]([N:23]3[CH2:22][CH2:21][N:20]([C:18]([O:17][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:19])[CH2:25][CH2:24]3)[S:3][CH:4]=2)[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 143452tert-Butyl piperazine-1-carboxylateHCID 27613592-Chloro-4-phenylthiazole

Product 1

HCID 68777857Tert-butyl 4-(4-phenyl-1,3-thiazol-2-yl)piperazine-1-carboxylateYield 25.4%

Reagents, catalysts & solvents 1

HCID 6228
Dimethylformamide
Solvent

Procedure

A solution of 2-chloro-4-phenyl-1,3-thiazole (1.54 mg, 7.87 mmol), 1-(tert-butoxycarbonyl)-piperazine (4.40 g, 23.6 mmol) and potassium carbonate (1.09 g, 7.87 mmol) in dimethylformamide (26 ml) was stirred at 120° C. for 2 hours. Water was poured to the reaction mixture, and the resulting solution was extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=9:1) to give 691 mg (25.4%) of tert-butyl 4-(4-phenyl-1,3-thiazol-2-yl)piperazine-1-carboxylate as a solid.

Workup

  1. extractionthe resulting solution was extracted with ethyl acetate
  2. washThe extract was washed with water
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=9:1)

Sources & evidence

ORD record
ord-951dbc3ab50141feb4c806e0575a73a6
Source dataset
uspto-grants-2010_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07851473B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes