1-(2-Hydroxyethyl)piperazine → HCID 24963808, compound

HRID 333398Notes

Reaction equation

HRID 333398 reaction equation
Br[C:2]1[C:6]([CH3:8])([CH3:7])[O:5]/[C:4](=[C:9]2/[C:10](=[O:19])[NH:11][C:12]3[C:17]/2=[CH:16][CH:15]=[C:14]([F:18])[CH:13]=3)/[CH:3]=1.[OH:20][CH2:21][CH2:22][N:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1>CN(C=O)C.C(OCC)(=O)C>[F:18][C:14]1[CH:13]=[C:12]2[C:17](/[C:9](=[C:4]3\[O:5][C:6]([CH3:8])([CH3:7])[C:2]([N:26]4[CH2:27][CH2:28][N:23]([CH2:22][CH2:21][OH:20])[CH2:24][CH2:25]4)=[CH:3]\3)/[C:10](=[O:19])[NH:11]2)=[CH:16][CH:15]=1

Participants

5

Reactant 2

HCID 76771-(2-Hydroxyethyl)piperazineHCID 58926029(3E)-3-(4-bromo-5,5-dimethylfuran-2(5H)-ylidene)-6-fluoro-1,3-dihydro-2H-indol-2-one

Product 1

HCID 24963808HCID 24963808, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of (3E)-3-(4-bromo-5,5-dimethylfuran-2(5H)-ylidene)-6-fluoro-1,3-dihydro-2H-indol-2-one (95 mg, 0.29 mmol) and 1-(2-hydroxyethyl)piperazine (0.40 mL, 3.3 mmol) in 6 mL of DMF was heated in 100° C. bath for 2 hours. The mixture was cooled, diluted with ethyl acetate (60 mL), washed with brine (3×50 mL), and concentrated to give the crude product, which was purified by silica gel chromatography with 5-20% methanol in chloroform to give (3E)-6-fluoro-3-{4-[4-(2-hydroxyethyl)piperazin-1-yl]-5,5-dimethylfuran-2(5H)-ylidene}-1,3-dihydro-2H-indol-2-one as a grey solid. Yield: 73 mg, 67%.

Workup

  1. temperatureThe mixture was cooled
  2. washwashed with brine (3×50 mL)
  3. concentrationconcentrated
  4. customto give the crude product, which
  5. customwas purified by silica gel chromatography with 5-20% methanol in chloroform

Sources & evidence

ORD record
ord-e223afae471a4f4f8b6af3550c42ca06
Source dataset
uspto-grants-2014_11
Patent number
US08877923B2

Reaction notes

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