Sodium Carbonate → N-(6-(3-(4-Methylphenylsulfonamido)phenyl)imidazo[1,2-b]pyridazin-2-yl)acetamide

HRID 1162432Notes

Reaction equation

HRID 1162432 reaction equation
Cl[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([CH:8]=[C:9]([NH:11][C:12](=[O:14])[CH3:13])[N:10]=2)[N:7]=1.[CH3:15][C:16]1[CH:21]=[CH:20][C:19]([S:22]([NH:25][C:26]2[CH:31]=[CH:30][CH:29]=[C:28](B3OC(C)(C)C(C)(C)O3)[CH:27]=2)(=[O:24])=[O:23])=[CH:18][CH:17]=1.C(=O)([O-])[O-].[Na+].[Na+]>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CN(C=O)C>[CH3:15][C:16]1[CH:17]=[CH:18][C:19]([S:22]([NH:25][C:26]2[CH:31]=[C:30]([C:2]3[CH:3]=[CH:4][C:5]4[N:6]([CH:8]=[C:9]([NH:11][C:12](=[O:14])[CH3:13])[N:10]=4)[N:7]=3)[CH:29]=[CH:28][CH:27]=2)(=[O:24])=[O:23])=[CH:20][CH:21]=1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 162177213-(p-Toluenesulfonylamino)phenylboronic acid pinacol esterHCID 59519510N-(6-chloroimidazo[1,2-b]pyridazin-2-yl)acetamide

Product 1

HCID 44124523N-(6-(3-(4-Methylphenylsulfonamido)phenyl)imidazo[1,2-b]pyridazin-2-yl)acetamide

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

To a 10-mL, round-bottomed flask was added N-(6-chloroimidazo[1,2-b]pyridazin-2-yl)acetamide from Step 4 (0.060 g, 0.28 mmol), 4-methyl-N-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)benzenesulfonamide (0.19 g, 0.51 mmol, Aldrich, St. Louis, Mo.), DMF (3.0 mL), and aq. sodium carbonate (0.85 mL, 1.7 mmol, 2 M). The mixture was carefully evacuated and backfilled with N2. Bis(triphenylphosphine)palladium(II) chloride (20 mg, 0.028 mmol, Strem Chemical, Inc., Newburyport, Mass.) was added. Once again, the mixture was carefully evacuated and backfilled with N2. The mixture was stirred at 100° C. for 2 h and then allowed to cool to room temperature. The mixture was poured into water (75 mL) and extracted with EtOAc (3×75 mL). The combined extracts were washed with water (2×50 mL) and brine (50 mL) then dried (Na2SO4) and concentrated onto silica. Purification by silica gel chromatography (1 to 5% MeOH (2 M in NH3)/CH2Cl2) afforded the title compound as an off-white solid. MS (ESI positive ion) m/z: 422 (M+1). 1H NMR (400 MHz, DMSO-d6): δ ppm 10.92 (s, 1H), 10.44 (s, 1H), 8.26 (s, 1H), 8.05 (d, J=9.6 Hz, 1H), 7.77 (t, J=1.8 Hz, 1H), 7.67-7.71 (m, 3H), 7.61 (d, J=9.6 Hz, 1H), 7.40 (t, J=7.9 Hz, 1H), 7.35 (d, J=8.0 Hz, 2H), 7.19 (dd, J=8.0 Hz, 1.4 Hz, 1H), 2.32 (s, 3H), 2.11 (s, 3H).

Workup

  1. customThe mixture was carefully evacuated
  2. customOnce again, the mixture was carefully evacuated
  3. temperatureto cool to room temperature
  4. additionThe mixture was poured into water (75 mL)
  5. extractionextracted with EtOAc (3×75 mL)
  6. washThe combined extracts were washed with water (2×50 mL) and brine (50 mL)
  7. dry with materialthen dried (Na2SO4)
  8. concentrationconcentrated onto silica
  9. customPurification by silica gel chromatography (1 to 5% MeOH (2 M in NH3)/CH2Cl2)

Sources & evidence

ORD record
ord-4c244a75a61245e09554f016448e7e4c
Source dataset
uspto-grants-2010_10
Patent number
US07820665B2

Reaction notes

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