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

Participants

Reaction Conditions

Reaction Steps

3-(4-Hydroxy-phenyl)-2-isopropoxy-propionic acid methyl ester (1.7 g, 7.3 mmol), Toluene-4-sulfonic acid 2-[1-(4-methoxy-benzyl)-3-methyl-2-oxo-imidazolidin-4-yl]-ethyl ester (3.4 g, 8.0 mmol), and Cs2CO3 (3.6 g, 11 mmol) were combined in 10 mL of DMF and heated at 55° C. for 18 h. After cooling, the mixture is diluted with 100 mL of water and extracted with 3×20 mL of ethyl acetate. The organics were dried, concentrated, and the residue is purified by flash chromatography using 7/3 ethyl actate/hexanes to give 3.0 g (86%) of the title compound as an oil. NMR

Provenance & Evidence