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Dichloromethane → Methyl 4-methyl-3-(1H-pyrazol-5-yl)benzoate

HRID 1487911
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1487911
[CH3:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1B1OC(C)(C)C(C)(C)O1.I[C:22]1[NH:26][N:25]=[CH:24][CH:23]=1.C(Cl)Cl>O1CCOCC1.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]>[CH3:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[C:22]1[NH:26][N:25]=[CH:24][CH:23]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 6344DichloromethaneHCID 12398303-Iodo-1H-pyrazoleHCID 532171365-Methoxycarbonyl-2-methylphenylboronic acid pinacol ester2×

Produkt 1

HCID 90030661Methyl 4-methyl-3-(1H-pyrazol-5-yl)benzoateAusbeute 41,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 44119782
Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)
Katalysator
HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

To methyl 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate (compound 5.4, 800 mg, 2.9 mmol) in dioxane (30 mL) was added 5-iodo-1H-pyrazole (674 mg, 3.5 mmol), and Pd(dppf)Cl2.DCM (237 mg, 0.29 mmol). The mixture was degassed with argon and stirred for 10 minutes then an aqueous potassium carbonate solution (2 M, 8 mL) was added. The mixture was heated at 90° C. for 18 h, then cooled and diluted with EtOAc and filtered through Celite®. The filtrate was washed with brine, dried (MgSO4), filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (SiO2; 0-30% EtOAc in hexanes) to yield 258 mg (41%) of the title compound as a solid. m/z (ES+) 217 (M+H)+.

Aufarbeitung

  1. customThe mixture was degassed with argon
  2. additionan aqueous potassium carbonate solution (2 M, 8 mL) was added
  3. temperaturecooled
  4. additiondiluted with EtOAc
  5. filtrationfiltered through Celite®
  6. washThe filtrate was washed with brine
  7. dry with materialdried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated under reduced pressure
  10. customThe residue was purified by flash chromatography (SiO2; 0-30% EtOAc in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-261e5117cac04f79963c187fdd4de7bf
Quelldatensatz
uspto-grants-2016_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09428502B2

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