Cesium carbonate → (R)-4-((R)-1-(5-bromo-1,2-dimethyl-1H-benzo[d]imidazol-7-yloxy)ethyl)-1-((R)-1-phenylethyl)pyrrolidin-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-bromo-1-methyl-1H-benzo[d]imidazol-7-ol (30 mgs, 0.124 mmol) in DMF (3 mL) was added (S)-1-((R)-5-oxo-1-((R)-1-phenylethyl)pyrrolidin-3-yl)ethyl methanesulfonate 1.17 (60 mgs, 0.193 mmol) and Cs2CO3 (69 mgs, 0.212 mmol) and the reaction mixture was heated at 90° C. for 1 h. The reaction mixture was then diluted with ethylacetate and washed with water (3×), brine and dried over anhydrous magnesium sulfate. Filtration, followed by concentration gave (R)-4-((R)-1-(5-bromo-1,2-dimethyl-1H-benzo[d]imidazol-7-yloxy)ethyl)-1-((R)-1-phenylethyl)pyrrolidin-2-one, which was used for next step without further purification.

Provenance & Evidence