Triethylamine → tert-Butyl 4-(6-bromo-1-(methylsulfonyl)-1H-pyrrolo[3,2-c]pyridin-2-yl)-1H-pyrazole-1-carboxylate

HRID 2205855Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2205855
[Br:1][C:2]1[CH:7]=[C:6]([NH:8][S:9]([CH3:12])(=[O:11])=[O:10])[C:5](I)=[CH:4][N:3]=1.[C:14]([C:16]1[CH:17]=[N:18][N:19]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH:20]=1)#[CH:15].C(N(CC)CC)C>[Cu]I.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.CN(C=O)C>[Br:1][C:2]1[N:3]=[CH:4][C:5]2[CH:15]=[C:14]([C:16]3[CH:17]=[N:18][N:19]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH:20]=3)[N:8]([S:9]([CH3:12])(=[O:11])=[O:10])[C:6]=2[CH:7]=1

Komponenten

7

Edukt 3

HCID 8471TriethylamineHCID 45382264tert-butyl 4-ethynyl-1H-pyrazole-1-carboxylateHCID 86706267N-(2-Bromo-5-iodopyridin-4-yl)methanesulfonamide

Produkt 1

HCID 86706269tert-Butyl 4-(6-bromo-1-(methylsulfonyl)-1H-pyrrolo[3,2-c]pyridin-2-yl)-1H-pyrazole-1-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 178418476HCID 178418476, VerbindungKatalysatorHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a mixture of N-(2-bromo-5-iodopyridin-4-yl)methanesulfonamide (8) (419 mg, 1.11 mmol) and tert-butyl 4-ethynyl-1H-pyrazole-1-carboxylate (4) (277 mg, 1.44 mmol, 1.3 equiv) was added copper(I) iodide (7.4 mg 0.039 mmole) and DMF (4 mL), followed by triethylamine (0.69 mL, 497 mg, 4.92 mmol). The reaction was flushed twice with nitrogen. Bis(triphenylphosphine)palladium chloride (27 mg, 0.038 mmole) was added and the reaction flushed twice more with nitrogen, it was heated at 60° C. for 70 minutes. The reaction was added to water (40 mL) and extracted with ethyl acetate (3×20 mL). The combined extracts were washed with water (3×20 mL) and with brine, dried and evaporated. The residue was purified on four 2 mm 20×20 cm silica prep tlc plates, eluted with 3:1 ethyl acetate:cyclohexane. The product band was recovered with acetone giving the title compound (251 mg, 51%). 1H-NMR (CDCl3, 500 MHz): δ 1.73 (s, 9H), 3.02 (s, 3H), 6.81 (s, 1H), 7.97 (s, 1H), 8.26 (s, 1H), 8.43 (s, 1H), 8.69 (s, 1H).

Aufarbeitung

  1. customThe reaction was flushed twice with nitrogen
  2. customthe reaction flushed twice more with nitrogen, it
  3. additionThe reaction was added to water (40 mL)
  4. extractionextracted with ethyl acetate (3×20 mL)
  5. washThe combined extracts were washed with water (3×20 mL) and with brine
  6. customdried
  7. customevaporated
  8. customThe residue was purified on four 2 mm 20×20 cm silica prep tlc plates
  9. washeluted with 3:1 ethyl acetate
  10. customThe product band was recovered with acetone giving the title compound (251 mg, 51%)

Quellen und Nachweise

ORD-Eintrag
ord-26e9f8686b824fa6bfdef7eefdf872b9
Quelldatensatz
uspto-grants-2016_06
Patentnummer
US09371319B2

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