Acetonitrile → 4-(2,4-Dimethoxy-3-fluoro-phenylethynyl)-1-methyl-1H-pyrazole

HRID 1042579Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1042579
[CH3:1][O:2][C:3]1[C:8]([F:9])=[C:7]([O:10][CH3:11])[CH:6]=[CH:5][C:4]=1I.[C:13]([C:15]1[CH:16]=[N:17][N:18]([CH3:20])[CH:19]=1)#[CH:14].C(#N)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I.C(N(CC)CC)C>[CH3:1][O:2][C:3]1[C:8]([F:9])=[C:7]([O:10][CH3:11])[CH:6]=[CH:5][C:4]=1[C:14]#[C:13][C:15]1[CH:16]=[N:17][N:18]([CH3:20])[CH:19]=1

Komponenten

7

Edukt 3

HCID 6342AcetonitrileHCID 509982281,3-Dimethoxy-2-fluoro-4-iodobenzeneHCID 511383214-Ethynyl-1-methyl-1H-pyrazole

Produkt 1

HCID 687686434-(2,4-Dimethoxy-3-fluoro-phenylethynyl)-1-methyl-1H-pyrazoleAusbeute 86 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 178418476HCID 178418476, VerbindungKatalysatorHCID 8471TriethylamineLösungsmittel

Versuchsvorschrift

To a mixture of (0.95 mmol) of 2,4-dimethoxy-3-fluoro-iodo benzene, 0.122 g (1.15 mmol) of 4-ethynyl-1-methyl-1H-pyrazole, 0.028 g (0.04 mmol) of dichlorobis(triphenylphosphine)palladium (II) and 8 mg (0.042 mmol) of copper (I) iodide 4 mL of anhydrous acetonitrile and 2 mL of triethylamine were added under nitrogen atmosphere at room temperature. The resulting mixture was stirred for 1 hour, when TLC indicated a consumption of the iodobenzene. The solvent was evaporated under reduced pressure and the residue purified by flash column chromatography (silica gel; dichloromethane:ethyl acetate 9:1) to give the title compound in an 86% yield as creamy crystals. H1 NMR (CDCl3) 3.88 (s, 3H, Me); 3.89 (s, 3H, MeO); 4.05 (d, 3H, MeO, J=1.34 Hz); 6.62 (tr, 1H, CH, J=8.2 Hz); 7.12 (dd, 1H, CH, J=8.2 Hz, J=2.55 Hz); 7.53 (s, 1H, CH pyr); 7.62 s, 1H, CH pyr).

Aufarbeitung

  1. additionwere added under nitrogen atmosphere at room temperature
  2. customa consumption of the iodobenzene
  3. customThe solvent was evaporated under reduced pressure
  4. customthe residue purified by flash column chromatography (silica gel; dichloromethane:ethyl acetate 9:1)

Quellen und Nachweise

ORD-Eintrag
ord-28d9fbc1ba384e94b3604b7c73efc48c
Quelldatensatz
uspto-grants-2013_10
Patentnummer
US08557982B2

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