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

HRID 2263279Notes

Reaction equation

HRID 2263279 reaction equation
Br[C:2]1[S:3][CH:4]=[C:5]([C:7]2[CH:8]=[C:9]([CH:12]=[CH:13][CH:14]=2)[C:10]#[N:11])[N:6]=1.[N:15]1([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:20][CH2:19][NH:18][CH2:17][CH2:16]1.C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[C:10]([C:9]1[CH:8]=[C:7]([C:5]2[N:6]=[C:2]([N:18]3[CH2:17][CH2:16][N:15]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:20][CH2:19]3)[S:3][CH:4]=2)[CH:14]=[CH:13][CH:12]=1)#[N:11]

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 143452tert-Butyl piperazine-1-carboxylateHCID 687778083-(2-Bromo-1,3-thiazol-4-yl)benzonitrile

Product 1

HCID 68779422Tert-butyl 4-[4-(3-cyanophenyl)-1,3-thiazol-2-yl]piperazine-1-carboxylateYield 50.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 3-(2-bromo-1,3-thiazol-4-yl)benzonitrile (990 mg, 4.90 mmol), tert-butyl piperazine-1-carboxylate (1.37 g, 7.34 mmol) and potassium carbonate (677 mg, 4.90 mmol) in dimethylformamide (16 ml) was stirred at 120° C. for 6 hours. Water was poured to the reaction mixture, and the mixture 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 920 mg (50.7%) of the desired product as a solid.

Workup

  1. extractionthe mixture 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-ffb06c7acbbc41fe8c8679592d98f6b7
Source dataset
uspto-grants-2010_12
Patent number
US07851473B2

Reaction notes

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