Hydrochloric Acid → HCID 21075903, Verbindung

HRID 1373878Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1373878
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8]([Cl:12])=[C:7]([OH:13])[CH:6]=[CH:5]2.[S:14]1[C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][C:17]=2[CH:16]=[C:15]1B(O)O.C(=O)([O-])[O-].[K+].[K+].Cl>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.O.C1COCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[S:14]1[C:15]([C:2]2[CH:3]=[C:4]3[C:9](=[CH:10][CH:11]=2)[C:8]([Cl:12])=[C:7]([OH:13])[CH:6]=[CH:5]3)=[CH:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][C:18]1=2

Komponenten

9

Edukt 4

HCID 313Hydrochloric AcidHCID 2359Benzo(B)Thiophene-2-Boronic AcidHCID 11430Potassium CarbonateHCID 220481596-Bromo-1-chloronaphthalen-2-ol

Produkt 1

HCID 21075903HCID 21075903, VerbindungAusbeute 23,9 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

A mixture of 6-bromo-1-chloro-naphthalen-2-ol (11.2 g, 43.5 mmol), benzothiophene-2-boronic acid (15.1 g, 85.0 mmol) in three portions, palladium (II) acetate (0.76 g, 3.43 mmol) in three portions, potassium carbonate (30.1 g, 224 mmol) in three portions, tetrabutylammonium bromide (14.0 g, 43.5 mmol) in water (65 mL) and THF (40 mL) was heated at 70° C. for 8.5 hours. The reaction mixture was allowed to cool to ambient temperature and then poured into excess 2N hydrochloric acid. It was extracted with chloroform. The organic phase was then washed with water and brine. It was dried with anhydrous magnesium sulfate, filtered and solvent evaporated. The residue was purified by flash chromatography using 100% chloroform, 30–50% 1,2-dichloroethane in hexane and 20–30% 1,2-dichloroethane in hexane (Biotage apparatus) eluent. Drying at 60° C. in vacuo for 20 minutes yielded 6-benzo[b]thiophen-2-yl-1-chloro-naphthalen-2-ol as a beige-yellow solid (3.22 g, 23.9%) MP: 220–1° C.; Mass spectrum (−ES, [M−H]−) m/z 309/311. 1H NMR (500 MHz, DMSO-d6): δ 10.64 (s, 1H), 8.26 (d, 1H, J=1.73 Hz), 8.11 (d, 1H, J=8.85 Hz), 8.05 (dd, 1H, J=8.85 and 1.83 Hz), 7.95–8.01 (m, 2H), 7.87–7.92 (m, 2H), 7.33–7.43 ppm (m, 3H). Elemental Analysis for C18H11ClOS: Calcd: C, 69.56; H, 3.57; N, 0.00; Found: C, 69.58; H, 3.83; N, 0.00.

Aufarbeitung

  1. temperatureto cool to ambient temperature
  2. extractionIt was extracted with chloroform
  3. washThe organic phase was then washed with water and brine
  4. dry with materialIt was dried with anhydrous magnesium sulfate
  5. filtrationfiltered
  6. customsolvent evaporated
  7. customThe residue was purified by flash chromatography
  8. customDrying at 60° C. in vacuo for 20 minutes

Quellen und Nachweise

ORD-Eintrag
ord-9b0ac81a2f324e9cbaaea8c626923e6a
Quelldatensatz
uspto-grants-2007_01
Patentnummer
US07163954B2

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