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Potassium Iodide → HCID 57426205, compound

HRID 1094120
Notes
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Reaction equation

HRID 1094120 reaction equation
[N+:1]([C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[CH:6]([CH2:13][CH2:14][CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH2:7][NH:8]2)([O-:3])=[O:2].C(=O)([O-])[O-].[Na+].[Na+].[I-].[K+].Br[CH2:30][C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32]>CC(C)=O>[C:34]([O:33][C:31](=[O:32])[CH2:30][N:8]1[C:9]2[C:5](=[C:4]([N+:1]([O-:3])=[O:2])[CH:12]=[CH:11][CH:10]=2)[CH:6]([CH2:13][CH2:14][CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH2:7]1)([CH3:37])([CH3:36])[CH3:35]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 4875Potassium IodideHCID 10340Sodium CarbonateHCID 79177tert-Butyl bromoacetateHCID 57426204HCID 57426204, compound

Product 1

HCID 57426205HCID 57426205, compound

Reagents, catalysts & solvents 1

HCID 180Acetone
Solvent

Procedure

To a solution of ethyl 4-(4-nitro-2,3-dihydro-1H-indol-3-yl)butanoate from Step B (1.10 g, 3.95 mmol), sodium carbonate (628 mg, 5.93 mmol), and potassium iodide (131 mg, 0.79 mmol) in acetone (10 mL) was added tert-butyl bromoacetate (17.5 mL, 119 mmol). The mixture was heated at reflux for 18 h, then cooled to ambient temperature and concentrated in vacuo. The residue was partitioned between H2O (30 mL) and EtOAc (2×60 mL) and the organic extracts were dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—90:10 to 65:35, to give the title compound. MS: m/z=393 (M+1).

Workup

  1. temperatureThe mixture was heated
  2. temperatureat reflux for 18 h
  3. concentrationconcentrated in vacuo
  4. customThe residue was partitioned between H2O (30 mL) and EtOAc (2×60 mL)
  5. dry with materialthe organic extracts were dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe crude product was purified by silica gel chromatography
  9. washeluting with a gradient of hexane

Sources & evidence

ORD record
ord-62ae365fa64745218fdfb2deba7067ad
Source dataset
uspto-grants-2012_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08133891B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes