Water → tert-butyl 5-(1-ethyl-2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)-2,3-dihydro-1H-indole-1-carboxylate

HRID 1429906Notes

Reaction equation

HRID 1429906 reaction equation
[O:1]=[C:2]1[N:10]([C:11]2[CH:12]=[C:13]3[C:17](=[CH:18][CH:19]=2)[N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15][CH2:14]3)[C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:4]2[NH:3]1.[CH2:27](I)[CH3:28].C(=O)([O-])[O-].[Cs+].[Cs+].O>CN(C=O)C>[CH2:27]([N:3]1[C:4]2[C:5](=[N:6][CH:7]=[CH:8][CH:9]=2)[N:10]([C:11]2[CH:12]=[C:13]3[C:17](=[CH:18][CH:19]=2)[N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15][CH2:14]3)[C:2]1=[O:1])[CH3:28]

Participants

6

Reactant 4

HCID 962WaterHCID 6340IodoethaneHCID 10796Cesium carbonateHCID 58577557tert-butyl 5-(2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)-2,3-dihydro-1H-indole-1-carboxylate

Product 1

HCID 58577726tert-butyl 5-(1-ethyl-2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)-2,3-dihydro-1H-indole-1-carboxylateYield 85.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of tert-butyl 5-(2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)-2,3-dihydro-1H-indole-1-carboxylate (900 mg), ethyl iodide (418 mg) and cesium carbonate (1.25 g) in DMF (10 mL) was stirred at 50° C. for 12 h, treated with water and extracted with EtOAc. The organic layer was dried over MgSO4 and concentrated in vacuo. The residue was chromatographed on silica gel eluting with AcOEt/Hexane to give tert-butyl 5-(1-ethyl-2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)-2,3-dihydro-1H-indole-1-carboxylate (830 mg) as an amorphous solid.

Workup

  1. extractionextracted with EtOAc
  2. dry with materialThe organic layer was dried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customThe residue was chromatographed on silica gel eluting with AcOEt/Hexane

Sources & evidence

ORD record
ord-514ae2003f4341bd986c3df4991c4aa8
Source dataset
uspto-grants-2015_01
Patent number
US08940758B2

Reaction notes

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