Diphenylphosphinic chloride → (2R,3S,4R,5S)-4-(4-Chloro-2-fluoro-phenyl)-3-(3-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid (4-iodo-2-trifluoromethoxy-phenyl)-amide

Participants

Reaction Steps

In a 25 mL round-bottomed flask, (2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxylic acid compound with 2,2,2-trifluoroacetic acid (1:1) (200 mg, 344 μmol, Eq: 1.00), was combined with CH2Cl2 (5 ml) to give a clear solution. DIPEA (178 mg, 1.38 mmol, Eq: 4) and diphenylphosphinic chloride (244 mg, 1.03 mmol, Eq: 3) were added and the reaction was stirred at RT for 30 minutes. 4-Iodo-2-(trifluoromethoxy) aniline (136 mg, 447 μmol, Eq: 1.3) was added and the reaction mixture was stirred at RT overnight. The crude reaction mixture was concentrated in vacuum. The crude material was purified by flash chromatography (silica gel, 40 g, 0% to 20% EtOAc/Hexanes) to give the desired product as a white solid. 255 mg. (ES+) m/z Calcd: [(M+)+]: 752. found: 752.

Provenance & Evidence