Cesium carbonate → HCID 117843200, compound

Participants

Reaction Steps

2,2,2-trifluoroethyl trifluoromethanesulfonate (13 mg, 0.056 mmol) was added to a solution of (R)-4-((R)-1-(6-(3,4-dimethoxyphenyl)-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3.09 (20 mg, 0.052 mmol) and cesium carbonate (43 mg, 0.132 mmol) in 5 mL of DMF at room temperature. After 1 h, reaction mixture was taken up in ethyl acetate (100 mL) and washed with saturated NaHCO3 (aq) (2×100 mL) and brine. The separated organic layers were dried (MgSO4), filtered, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to yield (R)-4-((R)-1-(6-(3,4-dimethoxyphenyl)-3-(2,2,2-trifluoroethyl)-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3.10 and (R)-4-((R)-1-(6-(3,4-dimethoxyphenyl)-1-(2,2,2-trifluoroethyl)-1H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3.11.

Provenance & Evidence