1-(2-Hydroxyethyl)piperazine → HCID 43592166, compound

HRID 1854701Notes

Reaction equation

HRID 1854701 reaction equation
[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[C:4](F)[CH:3]=1.C(=O)([O-])[O-].[K+].[K+].[OH:17][CH2:18][CH2:19][N:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1>CN(C)C=O.C(OCC)(=O)C>[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[C:4]([N:23]2[CH2:24][CH2:25][N:20]([CH2:19][CH2:18][OH:17])[CH2:21][CH2:22]2)[CH:3]=1

Participants

6

Reactant 3

HCID 76771-(2-Hydroxyethyl)piperazineHCID 11430Potassium CarbonateHCID 1435174-Bromo-2-fluorobenzaldehyde

Product 1

HCID 43592166HCID 43592166, compoundYield 49%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
110 °C

Procedure

To a suspension of 4-bromo-2-fluorobenzaldehyde (281 μL, 2.37 mmol) and potassium carbonate (328 mg, 2.37 mmol) in 5 mL of dry N,N-dimethylformamide was added 4-(2-hydroxyethyl)piperazine (463 mg, 3.56 mmol) at room temperature. After being stirred at 110° C. for 12 h, the reaction mixture was diluted with ethyl acetate. The solution was washed with water, saturated NaHCO3 aqueous solution, brine, and dried over MgSO4. After filtration, the filtrate was concentrated in vacuo, and the residue was purified by silica gel column chromatography (chloroform/methanol=98/2 to 90/10) to obtain the title compound as a pale yellow powder (364 mg, 49%).

Workup

  1. washThe solution was washed with water, saturated NaHCO3 aqueous solution, brine
  2. dry with materialdried over MgSO4
  3. filtrationAfter filtration
  4. concentrationthe filtrate was concentrated in vacuo
  5. customthe residue was purified by silica gel column chromatography (chloroform/methanol=98/2 to 90/10)

Sources & evidence

ORD record
ord-fcb880fc26c340148925f0ad58e6e136
Source dataset
uspto-grants-2015_02
Patent number
US08962674B2

Reaction notes

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