Cesium carbonate → 3-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one

HRID 592622Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 592622
[NH2:1][C:2]1[CH:13]=[C:5]2[CH2:6][N:7]([C:10](=[O:12])[CH3:11])[CH2:8][CH2:9][N:4]2[N:3]=1.Br[C:15]1[C:16](=[O:23])[N:17]([CH3:22])[CH:18]=[C:19]([Br:21])[CH:20]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.CO.CCOCC.CCOC(C)=O.O>[C:10]([N:7]1[CH2:8][CH2:9][N:4]2[N:3]=[C:2]([NH:1][C:15]3[C:16](=[O:23])[N:17]([CH3:22])[CH:18]=[C:19]([Br:21])[CH:20]=3)[CH:13]=[C:5]2[CH2:6]1)(=[O:12])[CH3:11]

Komponenten

11

Edukt 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-oneHCID 580440081-(2-amino-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)ethanone

Produkt 1

HCID 580440563-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-oneAusbeute 41 %

Reagenzien, Katalysatoren, Lösungsmittel 6

HCID 9832798Tris(dibenzylideneacetone) dipalladiumKatalysatorHCID 887MethanolLösungsmittelHCID 962WaterLösungsmittelHCID 3283Diethyl EtherLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

A sealed tube was equipped with a magnetic stirrer and charged with 125f (860 mg, 4.8 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (1.8 g, 6.7 mmol), and cesium carbonate (3.4 g, 10.5 mmol) in 1,4-dioxane (67 mL). After bubbling nitrogen through the solution for 30 min, Xantphos (330 mg, 0.6 mmol) and tris(dibenzylideneacetone) dipalladium(0) (300 mg, 0.3 mmol) were added, and the reaction mixture was heated to 100° C. for 16 h. After this time, H2O (50 mL) and EtOAc (50 mL) were added. The aqueous layer was separated and extracted with EtOAc (2×50 mL). The combined organic extracts were washed with brine (100 mL) and dried over sodium sulfate. The resulting residue was purified by column chromatography eluting with a gradient of CH2Cl2— 60:35:5 CH2Cl2:Et2O:MeOH to afford a 41% yield of 125g (720 mg).

Aufarbeitung

  1. customA sealed tube was equipped with a magnetic stirrer
  2. customAfter bubbling nitrogen through the solution for 30 min
  3. customThe aqueous layer was separated
  4. extractionextracted with EtOAc (2×50 mL)
  5. washThe combined organic extracts were washed with brine (100 mL)
  6. dry with materialdried over sodium sulfate
  7. customThe resulting residue was purified by column chromatography
  8. washeluting with a gradient of CH2Cl2— 60:35:5 CH2Cl2

Quellen und Nachweise

ORD-Eintrag
ord-c40ac28baec747cc9e63087bcc0c2526
Quelldatensatz
uspto-grants-2016_01
Patentnummer
US09238655B2

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