Water → 3-chloro-4-(2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yloxy)benzenamine

HRID 2060667Notes

Reaction equation

HRID 2060667 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([NH2:16])[CH:5]=[CH:6][C:7]=1[O:8][C:9]1[CH:14]=[CH:13][N:12]=[C:11](Cl)[CH:10]=1.[CH3:17][N:18]1[CH:22]=[C:21](B2OC(C)(C)C(C)(C)O2)[CH:20]=[N:19]1.C([O-])([O-])=O.[K+].[K+].O>COCCOC.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>[Cl:1][C:2]1[CH:3]=[C:4]([NH2:16])[CH:5]=[CH:6][C:7]=1[O:8][C:9]1[CH:14]=[CH:13][N:12]=[C:11]([C:21]2[CH:20]=[N:19][N:18]([CH3:17])[CH:22]=2)[CH:10]=1

Participants

7

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 866416833-Chloro-4-(2-chloropyridin-4-yloxy)benzenamine

Product 1

HCID 673982863-chloro-4-(2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yloxy)benzenamineYield 104.8%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
90 °C

Procedure

3-Chloro-4-(2-chloropyridin-4-yloxy)benzenamine (0.89 g, 3.49 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-pyrazole (0.871 g, 4.19 mmol) and K2CO3 (1.302 g, 9.42 mmol) were combined in DME (6 ml)/H2O (7.5 ml) and the headspace was flushed with Ar for 10 min. Pd(Ph3P)4 (0.202 g, 0.174 mmol) was then added and the biphasic reaction was stirred with heating at 90° C. overnight. The reaction was cooled to RT and filtered to remove insoluble material. The filtrate was diluted with THF and washed with brine (3×). The combined aqueous phases were extracted with THF (2×). The combined organics were washed with brine (1×), dried (MgSO4), concentrated in vacuo and purified by silica gel chromatography (MeOH/CHCl3) to afford 3-chloro-4-(2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yloxy)benzenamine (1.10 g, 83% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.30-8.29 (m, 1H), 8.22 (s, 1H), 7.92 (s, 1H), 7.12 (m, 1H), 7.00-6.98 (m, 1H), 6.72 (br s, 1H), 6.58-6.54 (m, 1H), 6.47-6.44 (m, 1H), 5.44 (s, 2H), 3.84 (s, 3H); MS (ESI) m/z: 301.1 (M+H+): 303.0 (M+2+H+).

Workup

  1. customthe headspace was flushed with Ar for 10 min
  2. customthe biphasic reaction
  3. temperatureThe reaction was cooled to RT
  4. filtrationfiltered
  5. customto remove insoluble material
  6. additionThe filtrate was diluted with THF
  7. washwashed with brine (3×)
  8. extractionThe combined aqueous phases were extracted with THF (2×)
  9. washThe combined organics were washed with brine (1×)
  10. dry with materialdried (MgSO4)
  11. concentrationconcentrated in vacuo
  12. custompurified by silica gel chromatography (MeOH/CHCl3)

Sources & evidence

ORD record
ord-60905719ea034cbf93f3e1d49b5c4883
Source dataset
uspto-grants-2012_10
Patent number
US08278331B2

Reaction notes

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