Cesium carbonate → HCID 86696312, compound

Participants

Reaction Steps

In a manner similar to the method described in Example 23, (S)-benzyl 2-((chloromethoxy)-carbonylamino)propanoate was prepared from (S)-benzyl 2-aminopropanoate (Chem-Impex) and 1-chloromethyl chloroformate (Aldrich) in the presence of pyridine in methylene chloride. It was then reacted with chiral 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-3-methoxybenzoic acid and cesium carbonate in dimethylformamide to give chiral ((S)-1-(benzyloxy)-1-oxopropan-2-ylcarbamoyloxy)methyl 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-3-methoxybenzoate as a white solid.

Provenance & Evidence