Methanesulfonamide → HCID 67154090, compound

Participants

Reaction Steps

To a solution of (S)-2-((S)-1-carboxy-ethylamino)-3-(3′-chloro-biphenyl-4-yl)-propionic acid benzyl ester (600 mg, 1.37 mmol) in DCM (7 mL) and saturated aqueous NaHCO3 solution (2 mL) was added triphosgene (407 mg, 1.37 mmol). After being stirred for 0.5 hours, the reaction mixture was diluted with EtOAc and stirred for additional 0.5 hours until generation of gas was completed. The organic layer was separated, washed with brine and concentrated. This was dissolved in DCM (7 mL) and methanesulfonamide (195 mg, 2.06 mmol) was added. After being stirred at rt for 1 hour, the reaction mixture was diluted with EtOAc and washed with brine. The organic layer was dried over Na2SO4, concentrated and purified by silica gel column chromatography (eluent: 10% MeOH in DCM) to give (S)-3-(3′-chloro-biphenyl-4-yl)-2-((S)-2-methanesulfonylamino-1-methyl-2-oxo-ethylamino)-propionic acid benzyl ester. MS: m/z (MH+) 515; HPLC retention time 1.58 min (HPLC condition A).

Provenance & Evidence