Cesium carbonate → 2,2-Dimethyl-3-(4-{2-[3-methyl-2-oxo-1-(4-trifluoromethyl-benzyl)-imidazolidin-4-yl]-ethoxy}-phenyl)-propionic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(4-Hydroxy-phenyl)-2,2-dimethyl-propionic acid methyl ester (31 mg, 0.15 mmol) and Toluene-4-sulfonic acid 2-[3-methyl-2-oxo-1-(4-trifluoromethyl-benzyl)-imidazolidin-4-yl]-ethyl ester (75 mg, 0.16 mmol) in DMF (1 ml) is added Cs2CO3 (64 mg, 0.19 mmol), and the mixture heated at 60° C. for 15 hours. The mixture is cooled, diluted with water (25 ml) and extracted with ethyl acetate (2×25 ml). The combined organic extracts were washed with brine (25 ml), dried (Na2SO4), and concentrated to an oil. Purification by flash chromatography on a Biotage silica cartridge (gradient elution, 2:1 hexanes:ethyl acetate to 1:4 hexanes:ethyl acetate) produced an oil (69 mg, 94%).

Provenance & Evidence