Potassium Carbonate → 4-[3-(1,4-dimethyl-3H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzimidazol-1-yl]-pentanoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a mixture of 4-(2-oxo-2,3-dihydro-benzimidazol-1-yl)-pentanoic acid methyl ester (85 mg, 0.34 mmol) and (1,4-dimethyl-1H-indol-3-ylmethyl)-trimethylammonium iodide (175 mg, 0.51 mmol) in DMF (2.5 mL) was added K2CO3 (95 mg, 0.69 mmol). The mixture was stirred at 100° C. for 4 hours. The reaction mixture was allowed to cool to room temperature, diluted with EtOAc (50 mL) and washed with H2O (50 mL×3). The organic layer was dried over sodium sulfate and concentrated. The resulting residue was purified by CombiFlash with 25% EtOAc in Hexane as the eluent to afford the desired 4-[3-(1,4-dimethyl-3H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzimidazol-1-yl]-pentanoic acid methyl ester (120 mg, 86%).

Provenance & Evidence