Cesium carbonate → 4-tert-butyl-N-(5-chloro-2-pyrazolo[4,3-b]pyridin-1-yl-pyridin-3-yl)-benzenesulfonamide

HRID 502808Notes

Reaction equation

HRID 502808 reaction equation
Br[C:2]1[C:7]([NH:8][S:9]([C:12]2[CH:17]=[CH:16][C:15]([C:18]([CH3:21])([CH3:20])[CH3:19])=[CH:14][CH:13]=2)(=[O:11])=[O:10])=[CH:6][C:5]([Cl:22])=[CH:4][N:3]=1.[NH:23]1[C:31]2[C:26](=[N:27][CH:28]=[CH:29][CH:30]=2)[CH:25]=[N:24]1.CN[C@@H]1CCCC[C@H]1NC.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C(=O)C.[Cu](I)I.O.C(OCC)(=O)C>[C:18]([C:15]1[CH:16]=[CH:17][C:12]([S:9]([NH:8][C:7]2[C:2]([N:23]3[C:31]4[C:26](=[N:27][CH:28]=[CH:29][CH:30]=4)[CH:25]=[N:24]3)=[N:3][CH:4]=[C:5]([Cl:22])[CH:6]=2)(=[O:11])=[O:10])=[CH:13][CH:14]=1)([CH3:21])([CH3:20])[CH3:19]

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 2733821trans-N,N'-dimethyl-1,2-cyclohexanediamineHCID 216436531H-Pyrazolo(4,3-b)pyridineHCID 57942597N-(2-bromo-5-chloro-pyridin-3-yl)-4-tert-butyl-benzenesulfonamide

Product 1

HCID 251344004-tert-butyl-N-(5-chloro-2-pyrazolo[4,3-b]pyridin-1-yl-pyridin-3-yl)-benzenesulfonamide

Reagents, catalysts & solvents 4

HCID 83717Copper iodideCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 31374DimethylacetamideSolvent

Procedure

A solution of N-(2-bromo-5-chloro-pyridin-3-yl)-4-tert-butyl-benzene sulfonamide (226 mg, 0.559 mmol), 1H-pyrazolo[4,3-b]pyridine (100 mg, 0.839 mmol), trans-N,N′-dimethyl-cyclohexane-1,2-diamine (18 μL, 0.112 mmol), copper iodide (22 mg, 0.112 mmol), and cesium carbonate (383 mg, 1.17 mmol) in 2 mL of N,N-dimethylacetamide was heated at 130° C. for 2 hours. Ethyl acetate and water were added and the layers were separated. The organic layer was washed with brine, dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude reside was subsequently purified by flash column chromatography (0-100% ethyl acetate in hexanes) to afford 4-tert-butyl-N-(5-chloro-2-pyrazolo[4,3-b]pyridin-1-yl-pyridin-3-yl) -benzenesulfonamide: MS (ES) M+H expected 442.1, found 442.0.

Workup

  1. customthe layers were separated
  2. washThe organic layer was washed with brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe crude reside was subsequently purified by flash column chromatography (0-100% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-6356f6fc4b1f48548d889cb67c349a42
Source dataset
uspto-grants-2010_08
Patent number
US07776877B2

Reaction notes

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