Potassium Carbonate → HCID 21964293, Verbindung

HRID 2373484Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2373484
Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6]([CH2:11][OH:12])=[CH:5]2.[CH3:13][C:14]1[CH:15]=[C:16](B(O)O)[CH:17]=[CH:18][CH:19]=1.C(=O)([O-])[O-].[K+].[K+].BrC1C=C2C(=CC=1)N(CC1C=CC(C(C)(C)C)=CC=1)C=C2>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.O1CCOCC1.O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:13][C:14]1[CH:19]=[C:18]([C:2]2[CH:3]=[C:4]3[C:8](=[CH:9][CH:10]=2)[NH:7][C:6]([CH2:11][OH:12])=[CH:5]3)[CH:17]=[CH:16][CH:15]=1

Komponenten

9

Edukt 4

HCID 11430Potassium CarbonateHCID 27339503-Tolylboronic acid2×HCID 13567955(5-Bromo-1H-indol-2-yl)methanolHCID 21964287HCID 21964287, Verbindung

Produkt 1

HCID 21964293HCID 21964293, VerbindungAusbeute 63,5 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

A mixture of (5-bromo-1H-indol-2-yl) methanol (9 g, 39.8 mmol), 3-methylbenzeneboronic acid (6.14 g, 43.78 mmol), potassium carbonate (13.75 g, 99.5 mmol), palladium(II) acetate (0.045 g) and tetrabutylammonium bromide (12.84 g, 39.8 mmol) in 10% dioxane in water (degassed, 0.38 L) was stirred at 70° C. The reaction was monitored by TLC. Additional 3-methylbenzeneboronic acid (5.6 g, 39.8 mmol) was added. After no 5-bromo-1-(4-tert-butylbenzyl)-1H-indole was detected by TLC, the reaction was cooled to room temperature and the solvent was decanted. The residual thick oil was stirred with hexane. The hexane was decanted and the residue was partitioned between water and ethyl acetate. The ethyl acetate layer was separated, washed with water filtered and concentrated. The residue was purified by flash column chromatography using hexane/ethyl acetate (55:45) as an eluant to give [5-(3-Methylphenyl)-1H-indol-2-yl]methanol as a brown solid (6.0 g). Reaction of [5-(3-Methylphenyl)-1H-indol-2-yl]methanol with acetyl chloride according to the procedure described in step 4 of Example 1 afforded the title compound as an oil (3.94 g); Mass spectrum (ESI, [M−H]−) m/z 278. 1H NMR (400 MHz, DMSO-d6) δ 7.76 (s, 1H), 7.46 (s, 1H), 7.42-7.36 (m, 3H), 7.30 (s, 1H), 7.10 (d, 1H, J=7.48 Hz), 6.50 (s, 1H), 2.37 (s, 3H), and 2.07 ppm (s, 3H).

Aufarbeitung

  1. temperaturethe reaction was cooled to room temperature
  2. customthe solvent was decanted
  3. stirringThe residual thick oil was stirred with hexane
  4. customThe hexane was decanted
  5. customthe residue was partitioned between water and ethyl acetate
  6. customThe ethyl acetate layer was separated
  7. washwashed with water
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe residue was purified by flash column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-4c3876b9a12e41d58fd83badd8708aa8
Quelldatensatz
uspto-grants-2008_12
Patentnummer
US07459478B2

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