Potassium Iodide → HCID 57426205, compound

HRID 2426206Notes

Reaction equation

HRID 2426206 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]

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 180AcetoneSolvent

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=365 (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-247b6083021b49ab9b7360c78f5784af
Source dataset
uspto-grants-2011_06
Patent number
US07968540B2

Reaction notes

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