Cesium carbonate → 1-ethyl-3-[1-(1,3-thiazol-2-yl)-1H-indol-5-yl]-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

HRID 587480Notes

Reaction equation

HRID 587480 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][C:6]([N:10]3[C:14]4=[N:15][CH:16]=[CH:17][CH:18]=[C:13]4[N:12]([CH2:19][CH3:20])[C:11]3=[O:21])=[CH:7][CH:8]=2)[CH2:3][CH2:2]1.Cl[C:23]1[S:24][CH:25]=[CH:26][N:27]=1.C([O-])([O-])=O.[Cs+].[Cs+].C([O-])(O)=O.[Na+]>CN(C=O)C>[CH2:19]([N:12]1[C:13]2[C:14](=[N:15][CH:16]=[CH:17][CH:18]=2)[N:10]([C:6]2[CH:5]=[C:4]3[C:9](=[CH:8][CH:7]=2)[N:1]([C:23]2[S:24][CH:25]=[CH:26][N:27]=2)[CH:2]=[CH:3]3)[C:11]1=[O:21])[CH3:20]

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 764292-ChlorothiazoleHCID 516892Sodium BicarbonateHCID 585772823-(2,3-dihydro-1H-indol-5-yl)-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

Product 1

HCID 585773091-ethyl-3-[1-(1,3-thiazol-2-yl)-1H-indol-5-yl]-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-oneYield 27.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 3-(2,3-dihydro-1H-indol-5-yl)-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (75 mg), 2-chlorothiazole (48.0 mg) and Cs2CO3 (174 mg) in DMF (3 mL) was stirred at 100° C. for 3 days, treated with saturated NaHCO3 solution, and extracted with AcOEt. The organic layer was separated, dried over MgSO4 and concentrated in vacuo. The residue was purified by prep. HPLC and crystallized from AcOEt/Hexane to give the title compound as white crystals (27.0 mg).

Workup

  1. extractionextracted with AcOEt
  2. customThe organic layer was separated
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by prep
  6. customHPLC and crystallized from AcOEt/Hexane

Sources & evidence

ORD record
ord-112306af9cfa471faaa30116742add39
Source dataset
uspto-grants-2016_01
Patent number
US09226921B2

Reaction notes

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