Diisopropylethylamine → 6,6-Dimethyl-11-oxo-8-[2-(3-oxo-piperazin-1-yl)-ethoxy]-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

HRID 61719Notes

Reaction equation

HRID 61719 reaction equation
Br[CH2:2][CH2:3][O:4][C:5]1[CH:6]=[CH:7][C:8]2[C:20](=[O:21])[C:19]3[C:18]4[C:13](=[CH:14][C:15]([C:22]#[N:23])=[CH:16][CH:17]=4)[NH:12][C:11]=3[C:10]([CH3:25])([CH3:24])[C:9]=2[CH:26]=1.[NH:27]1[CH2:32][CH2:31][NH:30][CH2:29][C:28]1=[O:33].C(N(CC)C(C)C)(C)C>CN(C=O)C>[CH3:25][C:10]1([CH3:24])[C:11]2[NH:12][C:13]3[C:18](=[CH:17][CH:16]=[C:15]([C:22]#[N:23])[CH:14]=3)[C:19]=2[C:20](=[O:21])[C:8]2[CH:7]=[CH:6][C:5]([O:4][CH2:3][CH2:2][N:30]3[CH2:31][CH2:32][NH:27][C:28](=[O:33])[CH2:29]3)=[CH:26][C:9]1=2

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 231360Piperazin-2-oneHCID 66833930HCID 66833930, compound

Product 1

HCID 668340626,6-Dimethyl-11-oxo-8-[2-(3-oxo-piperazin-1-yl)-ethoxy]-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrileYield 80%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

To DMF solution (5 mL) of 8-(2-bromo-ethoxy)-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile (Compound A7-24, 30 mg, 0.07 mmol), piperazin-2-one (44.9 mg, 0.35 mmol) and N,N-diisopropylethylamine (0.061 mL, 0.35 mmol) were added at room temperature and stirred at 80° C. for 18 hr. After cooling to room temperature, the mixture was extracted with ethyl acetate washed with saturated brine. The organic layer was dried over magnesium sulfate. The drying agent was removed by filtration and the residues obtained after concentration under reduced pressure were purified by preparative TLC (dichloromethane/methanol) to obtain the title compound (white solid, 24 mg, 80%).

Workup

  1. temperatureAfter cooling to room temperature
  2. extractionthe mixture was extracted with ethyl acetate
  3. washwashed with saturated brine
  4. dry with materialThe organic layer was dried over magnesium sulfate
  5. customThe drying agent was removed by filtration
  6. customthe residues obtained
  7. concentrationafter concentration under reduced pressure
  8. customwere purified by preparative TLC (dichloromethane/methanol)

Sources & evidence

ORD record
ord-e8709303e5204a9ebe2e8c50e0e827f8
Source dataset
uspto-grants-2016_09
Patent number
US09440922B2

Reaction notes

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