Potassium Carbonate → 3-Chloro-2-(3-chloro-pyrazol-1-YL)-pyridine

HRID 571659Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 571659
Cl[C:2]1[C:7]([Cl:8])=[CH:6][CH:5]=[CH:4][N:3]=1.[Cl:9][C:10]1[CH:14]=[CH:13][NH:12][N:11]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[Cl:8][C:7]1[C:2]([N:12]2[CH:13]=[CH:14][C:10]([Cl:9])=[N:11]2)=[N:3][CH:4]=[CH:5][CH:6]=1

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 169882,3-DichloropyridineHCID 178478253HCID 178478253, Verbindung2×

Produkt 1

HCID 228315663-Chloro-2-(3-chloro-pyrazol-1-YL)-pyridine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

To a mixture of 2,3-dichloropyridine (92.60 g, 0.629 mol) and 3-chloropyrazole (i.e. the product of Step B) (64.44 g, 0.629 mol) in N,N-dimethylformamide (400 mL) was added potassium carbonate (147.78 g, 1.06 mol), and the reaction mixture was then heated to 100° C. for 36 hours. The reaction mixture was cooled to room temperature and slowly poured into ice water. The precipitated solids were filtered and washed with water. The solid filter cake was taken up in ethyl acetate, dried over magnesium sulfate and concentrated. The crude solid was chromatographed on silica gel using 20% ethyl acetate/hexane as eluent to afford the title product as a white solid (39.75 g). 1H NMR (CDCl3) δ 6.43 (s, 1H), 7.26 (m, 1H), 7.90 (d, 1H), 8.09 (s, 1H), 8.41 (d, 1H).

Aufarbeitung

  1. temperatureThe reaction mixture was cooled to room temperature
  2. filtrationThe precipitated solids were filtered
  3. washwashed with water
  4. filtrationThe solid filter cake
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated
  7. customThe crude solid was chromatographed on silica gel using 20% ethyl acetate/hexane as eluent

Quellen und Nachweise

ORD-Eintrag
ord-3f45bb451874453caf54a94bd77f4aea
Quelldatensatz
uspto-grants-2015_05
Patentnummer
US09029365B2

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