Ethyl bromoacetate → HCID 22396804, compound

HRID 1356331Notes

Reaction equation

HRID 1356331 reaction equation
[H-].[Na+].[Cl:3][C:4]1[C:12]2[NH:11][C:10]3[CH2:13][CH2:14][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:16][CH2:17][C:9]=3[C:8]=2[C:7]([Cl:25])=[CH:6][CH:5]=1.Br[CH2:27][C:28]([O:30][CH2:31][CH3:32])=[O:29]>CN(C=O)C>[Cl:3][C:4]1[C:12]2[N:11]([CH2:27][C:28]([O:30][CH2:31][CH3:32])=[O:29])[C:10]3[CH2:13][CH2:14][N:15]([C:18]([O:20][C:21]([CH3:22])([CH3:24])[CH3:23])=[O:19])[CH2:16][CH2:17][C:9]=3[C:8]=2[C:7]([Cl:25])=[CH:6][CH:5]=1

Participants

5

Reactant 3

HCID 7748Ethyl bromoacetateHCID 24758Sodium hydrideHCID 22396908HCID 22396908, compound

Product 1

HCID 22396804HCID 22396804, compoundYield 97.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Sodium hydride (60% dispersion in mineral oil, 0.85 g, 21 mmol) was added to a solution of tert-butyl 7,10-dichloro-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (5.0 g, 14 mmol) in DMF (75 mL). After 25 min, ethyl bromoacetate(3.1 mL, 28 mmol) was added. The reaction was quenched with saturated aqueous NH4Cl after 3 h and extracted with EtOAc (3×100 mL). The combined organic extracts were washed with brine, dried over Na2SO4, decanted, and concentrated. The crude product was purified by column chromatography with heptane/EtOAc (3:1) to give 6.0 g (96%) of a white foam: mp 118.5-119.5° C.; IR (diffuse reflectance) 2976, 1747, 1674, 1477, 1457, 1420, 1405, 1370, 1366, 1344, 1254, 1200, 1165, 1111, 930 cm−1; MS (EI) m/z 440 (M+), 386, 384, 339, 310, 305, 300, 298, 224, 57, 56; Anal. Calcd for C21H26Cl2N2O4: C, 57.15; H, 5.94; N, 6.35; found: C, 57.27; H, 6.01; N, 6.22.

Workup

  1. customThe reaction was quenched with saturated aqueous NH4Cl after 3 h
  2. extractionextracted with EtOAc (3×100 mL)
  3. washThe combined organic extracts were washed with brine
  4. dry with materialdried over Na2SO4
  5. customdecanted
  6. concentrationconcentrated
  7. customThe crude product was purified by column chromatography with heptane/EtOAc (3:1)

Sources & evidence

ORD record
ord-9b315cadb29541eebb80c02cb64ab5f2
Source dataset
uspto-grants-2003_07
Patent number
US06586421B2

Reaction notes

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