Cesium carbonate → 3-{2-[4-(4-Chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-2-oxo-2,3-dihydro-benzooxazole-6-carbonitrile

Participants

Reaction Steps

A mixture of 2-chloro-1-[4-(4-chloro-3-methoxy-phenyl)-piperazin-1-yl]-ethanone (1) (190 mg, 0.625 mmol, 1 eq), 2-oxo-2,3-dihydro-benzooxazole-6-carbonitrile (48) (100 mg, 0.625 mmol, 1 eq), cesium carbonate (400 mg, 1.23 mmol, 2 eq) in DMF (2 ml) was stirred at rt overnight. The reaction mixture was diluted with ethyl acetate, washed with water and purified with flash chromatography to give 3-{2-[4-(4-chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-2-oxo-2,3-dihydro-benzooxazole-6-carbonitrile (49).

Provenance & Evidence