Chloroform → 2-(2,6-Dichloro-4-vinylphenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridine 5 oxide

HRID 626803Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 626803
[CH2:1](N(CC)CC)[CH3:2].Br[C:9]1[CH:14]=[C:13]([Cl:15])[C:12]([N:16]2[CH:26]=[C:19]3[CH:20]=[N+:21]([O-:25])[CH:22]=[C:23]([F:24])[C:18]3=[N:17]2)=[C:11]([Cl:27])[CH:10]=1.C(Cl)(Cl)Cl>C(O)CC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[Cl:15][C:13]1[CH:14]=[C:9]([CH:1]=[CH2:2])[CH:10]=[C:11]([Cl:27])[C:12]=1[N:16]1[CH:26]=[C:19]2[CH:20]=[N+:21]([O-:25])[CH:22]=[C:23]([F:24])[C:18]2=[N:17]1

Komponenten

6

Edukt 3

HCID 6212ChloroformHCID 8471TriethylamineHCID 677022952-(4-Bromo-2,6-dichlorophenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridine 5 oxide

Produkt 1

HCID 677008712-(2,6-Dichloro-4-vinylphenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridine 5 oxideAusbeute 62 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)KatalysatorHCID 10311-PropanolLösungsmittel

Versuchsvorschrift

Triethylamine (3.5 mL, 25 mmol) was added to a mixture of 2-(4-bromo-2,6-dichlorophenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridine 5 oxide (1.88 g, 5.0 mmol), potassium vinyl trifluoroborate (1.0 g, 7.5 mmol) and Pd(dppf)Cl2.CHCl3 (408 mg, 0.5 mmol) in propan-1-ol (50 mL) and the reaction mixture was heated at 100° C. for 1.5 hours. The resultant mixture was allowed to cool to room temperature before being partitioned between ethyl acetate and saturated aqueous sodium hydrogen carbonate solution. The layers were separated and the organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (4-5% methanol in DCM) to afford the title compound as a beige solid (1.0 g, 62% yield). 1H NMR (400 MHz, DMSO-d6): δ 9.00 (d, J=2.6 Hz, 1H), 8.89 (d, J=1.4 Hz, 1H), 8.35 (dd, J=6.3, 1.5 Hz, 1H), 7.97 (s, 2H), 6.85 (dd, J=17.6, 11.0 Hz, 1H), 6.24 (d, J=17.6 Hz, 1H), 5.60 (d, J=11.0 Hz, 1H).

Aufarbeitung

  1. custombefore being partitioned between ethyl acetate and saturated aqueous sodium hydrogen carbonate solution
  2. customThe layers were separated
  3. washthe organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel flash chromatography (4-5% methanol in DCM)

Quellen und Nachweise

ORD-Eintrag
ord-18a2d21afb77416995e123e0e89c73a2
Quelldatensatz
uspto-grants-2016_04
Patentnummer
US09309240B2

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