Water → 4-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)pyridin-2-amine

HRID 450462Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 450462
Cl[C:2]1[CH:7]=[C:6]([O:8][C:9]2[C:10]([CH3:16])=[CH:11][C:12]([NH2:15])=[N:13][CH:14]=2)[CH:5]=[CH:4][N:3]=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-].[Cs+].[Cs+].O>CN(C=O)C>[CH3:16][C:10]1[C:9]([O:8][C:6]2[CH:5]=[CH:4][N:3]=[C:2]([C:21]3[CH:20]=[N:19][N:18]([CH3:17])[CH:22]=3)[CH:7]=2)=[CH:14][N:13]=[C:12]([NH2:15])[CH:11]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 10796Cesium carbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 866416905-(2-Chloropyridin-4-yloxy)-4-methylpyridin-2-amine

Produkt 1

HCID 686640964-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)pyridin-2-amineAusbeute 61 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

5-(2-chloropyridin-4-yloxy)-4-methylpyridin-2-amine (0.116 g, 0.492 mmol) was dissolved in DMF (2 ml) and 1-methyl-1H-pyrazole-4-boronic acid pinacol ester (0.154 g, 0.738 mmol) was added, followed by cesium carbonate (0.481 g, 1.477 mmol) and water (0.667 ml). Argon was bubbled through the mixture for several minutes, and then palladium tetrakistriphenylphosphine (0.028 g, 0.025 mmol) was added. The flask was fitted with a reflux condenser, flushed with argon, and heated under a balloon of argon at 90° C. for 16 hours. The mixture was then cooled to RT, and the solution was diluted with a 4:1 mix of ethyl acetate and THF (70 mL). It was washed with 10% aqueous LiCl (2×50 mL) and brine (50 mL), dried (MgSO4), evaporated in vacuo and purified via silica gel chromatography (DCM/MeOH) to yield 4-methyl-5-(2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yloxy)pyridin-2-amine as a clear oil (0.084 g, 61% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.30 (d, 1H), 8.22 (s, 1H), 7.93 (s, 1H), 7.69 (s, 1H), 7.11 (d, 1H), 6.50 (dd, 1H), 6.38 (s, 1H), 5.89 (s, 2H), 3.84 (s, 3H), 1.95 (s, 3H); MS (ESI) m/z: 282.1 (M+H+).

Aufarbeitung

  1. customArgon was bubbled through the mixture for several minutes
  2. customThe flask was fitted with a reflux condenser
  3. customflushed with argon
  4. temperatureThe mixture was then cooled to RT
  5. additionthe solution was diluted with a 4:1
  6. additionmix of ethyl acetate and THF (70 mL)
  7. washIt was washed with 10% aqueous LiCl (2×50 mL) and brine (50 mL)
  8. dry with materialdried (MgSO4)
  9. customevaporated in vacuo
  10. custompurified via silica gel chromatography (DCM/MeOH)

Quellen und Nachweise

ORD-Eintrag
ord-044c58250492428fbef0332492061512
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08486951B2

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