Potassium Phosphate, Tribasic → N-[3-(7-{-1H-pyrazol-4-yl}imidazo[1,2-b]pyridazin-3-yl)phenyl]-N'-(2,2,2-trifluoroethyl)urea

HRID 407067Notes

Reaction equation

HRID 407067 reaction equation
Cl[C:2]1[CH:7]=[N:6][N:5]2[C:8]([C:11]3[CH:12]=[C:13]([NH:17][C:18]([NH:20][CH2:21][C:22]([F:25])([F:24])[F:23])=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:9][N:10]=[C:4]2[CH:3]=1.CC1(C)C(C)(C)OB([C:34]2[CH:35]=[N:36][N:37](C(OC(C)(C)C)=O)[CH:38]=2)O1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH:36]1[CH:35]=[C:34]([C:2]2[CH:7]=[N:6][N:5]3[C:8]([C:11]4[CH:12]=[C:13]([NH:17][C:18]([NH:20][CH2:21][C:22]([F:25])([F:24])[F:23])=[O:19])[CH:14]=[CH:15][CH:16]=4)=[CH:9][N:10]=[C:4]3[CH:3]=2)[CH:38]=[N:37]1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 16217654tert-butyl 4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole-1-carboxylateHCID 67980172N-[3-(7-chloroimidazo[1,2-b]pyridazin-3-yl)phenyl]-N'-(2,2,2-trifluoroethyl)urea

Product 1

HCID 67980550N-[3-(7-{-1H-pyrazol-4-yl}imidazo[1,2-b]pyridazin-3-yl)phenyl]-N'-(2,2,2-trifluoroethyl)urea

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of N-[3-(7-chloroimidazo[1,2-b]pyridazin-3-yl)phenyl]-N′-(2,2,2-trifluoroethyl)urea (0.30 g, 0.81 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole-1-carboxylate (0.29 g, 0.97 mmol), tetrakis(triphenylphosphine)palladium(0) (46.9 mg, 0.0406 mmol) and K3PO4 (0.43 g, 2.0 mmol) in 1,4-dioxane (4.0 mL) and water (2 mL) was heated at 100° C. under an atmosphere of nitrogen for 3 h. After cooling, the reaction mixture was extracted with ethyl acetate (3×30 mL), and washed with brine. The combined organic layers were dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography on a silica gel column with methanol in dichloromethane (0-15%) to afford the desired product. LCMS (M+H)+: m/z=402.1.

Workup

  1. temperatureAfter cooling
  2. extractionthe reaction mixture was extracted with ethyl acetate (3×30 mL)
  3. washwashed with brine
  4. dry with materialThe combined organic layers were dried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by flash chromatography on a silica gel column with methanol in dichloromethane (0-15%)

Sources & evidence

ORD record
ord-6a254999230345d8bf5d7059d6d11af2
Source dataset
uspto-grants-2014_06
Patent number
US08754114B2

Reaction notes

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