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

Participants

Reaction Conditions

Reaction Steps

To a mixture of 2-methyl-2-(2-oxo-2,3-dihydro-benzimidazol-1-yl)-propionic acid tert-butyl ester (130 mg, 0.47 mmol) and (1,4-dimethyl-1H-indol-3-ylmethyl)-trimethylammonium iodide (250 mg, 0.73 mmol) in DMF (2.5 mL) was added K2CO3 (200 mg, 1.45 mmol). The mixture was stirred at 100° C. for 4 hours. The mixture was 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 30% EtOAc in Hexane as the eluent to afford the desired 2-[3-(1,4-dimethyl-3H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzimidazol-1-yl]-2methyl-propionic acid tert-butyl ester (138 mg, 68%).

Provenance & Evidence