Cesium carbonate → 1-[4-(1-Carboethoxy-1-(3,4-methylenedioxyphenyl)methoxy)phenylmethyl]-3-carboethoxy-2-benzimidazolinone

Participants

Reaction Steps

To a solution of 0.020 g (0.10 mmol) of 1-carboethoxy-2-benzimidazolinone dissolved in 250 gL DMF was added 0.035 g (0.11 mmol) of cesium carbonate and the resulting suspension was stirred under a nitrogen atmosphere for 10 minutes. A solution of the product of step B in 300 aL DMF was then added and the reaction mixture was stirred for an additional 1 hour. The mixture was suspended in 10% aqueous citric acid and extracted into ethyl acetate. The organic layer was separated, washed with saturated sodium bicarbonate and brine, dried (MgSO4), filtered, evaporated, and the residue was purified on a silica gel flash chromatography column eluted with 30% EtOAc-hexane. Evaporation of the purified fractions and drying in vacuo afforded 0.029 g (58%) of the title compound.

Provenance & Evidence