Cesium carbonate → 5-{1-tert-Butyl-2-[2-(2,4-dimethyl-oxazol-5-yl)-phenyl]-1H-benzimidazol-5-yl}-pyrimidin-2-ylamine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a vial are added 5-[1-tert-butyl-2-(2-iodo-phenyl)-1H-benzimidazol-5-yl]-pyrimidin-2-ylamine (50 mg, 0.107 mmol), 2,4-dimethyl-oxazole (21 mg, 0.216 mol), palladium(II) acetate (5 mg, 0.022 mmol), PPh3 (6 mg, 0.023 mmol) and Cs2CO3 (70 mg, 0.215 mmol) in DMF (1.5 mL). The reaction mixture is stirred at 140° C. for 18 hours. The reaction mixture is diluted with EtOAc/water. The organic layer is separated, washed with brine, dried under anhydrous Na2SO4, filtered and concentrated. The residue is purified by silica gel flash column chromatography with 0-5% MeOH/CH2Cl2 as the eluent. The product fractions are collected and concentrated to afford the title compound (19 mg, 41%) as an off-white solid. LCMS (ESMS): m/z 439.86 (M++1)

Herkunft & Nachweise