Methyl iodide → (4-fluoro-phenyl)-(3-methoxy-2-phenoxymethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-5-yl)-methanone

HRID 2369614Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2369614
IC.[F:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]([N:12]2[CH2:17][CH2:16][N:15]3[N:18]=[C:19]([CH2:22][O:23][C:24]4[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=4)[C:20]([OH:21])=[C:14]3[CH2:13]2)=[O:11])=[CH:6][CH:5]=1.[C:30]([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C>[F:3][C:4]1[CH:5]=[CH:6][C:7]([C:10]([N:12]2[CH2:17][CH2:16][N:15]3[N:18]=[C:19]([CH2:22][O:23][C:24]4[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=4)[C:20]([O:21][CH3:30])=[C:14]3[CH2:13]2)=[O:11])=[CH:8][CH:9]=1

Komponenten

5

Edukt 3

HCID 6328Methyl iodideHCID 10796Cesium carbonateHCID 67960185(4-fluoro-phenyl)-(3-hydroxy-2-phenoxymethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-5-yl)-methanone

Produkt 1

HCID 67960058(4-fluoro-phenyl)-(3-methoxy-2-phenoxymethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-5-yl)-methanoneAusbeute 25,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Iodomethane (0.005 mL, 0.08 mmol) was added to a stirred suspension of (4-fluoro-phenyl)-(3-hydroxy-2-phenoxymethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-5-yl)-methanone (19 mg, 0.052 mmol) and Cs2CO3 (0.034 g, 0.1 mmol) in DMF (0.5 mL). The mixture was stirred at room temperature for 45 minutes and the solvent was evaporated in vacuo. The crude product was purified by flash column chromatography (silica; AcOEt in DCM 0/100 to 100/0). The desired fractions were collected and the solvents evaporated in vacuo to yield (4-fluoro-phenyl)-(3-methoxy-2-phenoxymethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-5-yl)-methanone (5 mg, 25% yield) as a colourless oil. C21H20FN3O3 1H NMR (400 MHz, CDCl3) δ ppm 3.78 (br. s., 3H), 4.01 (br. s., 2H), 4.20 (br. s., 2H), 4.80 (br. s., 2H), 5.02 (s, 2H), 6.93-7.00 (m, 1H), 7.03 (d, J=7.9 Hz, 2H), 7.16 (t, J=8.7 Hz, 2H), 7.27-7.34 (m, 2H), 7.46-7.53 (m, 2H).

Aufarbeitung

  1. customthe solvent was evaporated in vacuo
  2. customThe crude product was purified by flash column chromatography (silica; AcOEt in DCM 0/100 to 100/0)
  3. customThe desired fractions were collected
  4. customthe solvents evaporated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-fc60274d495d498d8891e689ac8adf07
Quelldatensatz
uspto-grants-2014_04
Patentnummer
US08703946B2

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