Cesium carbonate → (R)-4-((R)-1-(5-(3,4-dimethoxyphenyl)-1-methyl-1H-benzo[d]imidazol-7-yloxy)ethyl)-1-((R)-1-phenylethyl)pyrrolidin-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(3,4-dimethoxyphenyl)-1-methyl-1H-benzo[d]imidazol-7-ol 2.53 (42 mg, 0.148 mmol) in DMF (3 mL) was added (S)-1-((R)-5-oxo-1-((R)-1-phenylethyl)pyrrolidin-3-yl)ethyl methanesulfonate 1.17 (55 mg, 0.177 mmol) and Cs2CO3 (72 mg, 0.22 mmol) and the reaction mixture was heated at 90° C. for 2 h. The reaction mixture was concentrated and purified by flash chromatography (SiO2, 2% MeOH/EtOAc 25% MeOH/EtOAc) to give (R)-4-((R)-1-(5-(3,4-dimethoxyphenyl)-1-methyl-1H-benzo[d]imidazol-7-yloxy)ethyl)-1-((R)-1-phenylethyl)pyrrolidin-2-one 2.55.

Provenance & Evidence