Benzyl Chloride → 1-benzyl-4-bromo-2-methyl-1H-benzo[d]imidazole

HRID 82524Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 82524
[CH2:1](Cl)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Br:9][C:10]1[C:18]2[N:17]=[C:16]([CH3:19])[NH:15][C:14]=2[CH:13]=[CH:12][CH:11]=1.[H-].[Na+]>CN(C=O)C.CO>[CH2:1]([N:15]1[C:14]2[CH:13]=[CH:12][CH:11]=[C:10]([Br:9])[C:18]=2[N:17]=[C:16]1[CH3:19])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 3

HCID 7503Benzyl ChlorideHCID 24758Sodium hydrideHCID 158289794-bromo-2-methyl-1H-1,3-benzodiazole

Produkt 1

HCID 671269161-benzyl-4-bromo-2-methyl-1H-benzo[d]imidazole

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Benzyl chloride (1.527 mL) was added to a solution of 4-bromo-2-methyl-1H-benzimidazole (1.40 g) and sodium hydride (0.531 g) in DMF (10 mL) at 0° C. The mixture was stirred at room temperature under a dry atmosphere for 1 h. The reaction mixture was diluted with MeOH and concentrated in vacuo. The residue was purified by column chromatography (NH silica gel, eluted with 5%-50% EtOAc in hexane) to give 1-benzyl-4-bromo-2-methyl-1H-benzo[d]imidazole (1.88 g) as tan oil. The mixture of 1-benzyl-4-bromo-2-methyl-1H-benzo[d]imidazole (496 mg), 3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (700 mg), Pd(Ph3P)4 (87 mg), sodium carbonate (476 mg) and THF (18 mL)-water (0.90 mL) was heated at 100° C. for 1 h under microwave irradiation. The mixture was poured into water at room temperature and extracted with EtOAc. The organic layer was separated, washed with brine, dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with 10%-50% EtOAc in hexane) to give 3-[4-(1-benzyl-2-methyl-1H-benzimidazol-4-yl)phenyl]-1-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (450 mg) as white crystals.

Aufarbeitung

  1. concentrationconcentrated in vacuo
  2. customThe residue was purified by column chromatography (NH silica gel, eluted with 5%-50% EtOAc in hexane)

Quellen und Nachweise

ORD-Eintrag
ord-08073f0964a6467c9e786e8880a9c5d3
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846713B2

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