Dicyclohexylcarbodiimide → 4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)-N-(4-(5-(4'-methyl-[1,1'-biphenyl]-4-yl)-1,2,4-oxadiazol-3-yl)benzyl)-N-(2-(methylsulfonamido)-2-oxoethyl)benzamide

Participants

Reaction Steps

To a stirred solution of 2-(4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)-N-(4-(5-(4′-methyl-[1,1′-biphenyl]-4-yl)-1,2,4-oxadiazol-3-yl)benzyl)benzamido)acetic acid 354 (15 mg, 0.02 mmol), methanesulfonamide (2.9 mg, 0.03 mmol) and N,N-dimethylaminopyridine (5 mg, 0.04 mmol) in anhydrous DCM (1 mL) was added dicylcohexylcarbodiimide (6.3 mg). The reaction mixture was stirred at room temperature for 12 h. The reaction was diluted with DCM (2 mL) and washed with saturated NaHCO3 solution (5 mL), brine (5 mL), dried over (MgSO4) then concentrated. The crude product was isolated by HPLC to afford 4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)-N-(4-(5-(4′-methyl-[1,1′-biphenyl]-4-yl)-1,2,4-oxadiazol-3-yl)benzyl)-N-(2-(methylsulfonamido)-2-oxoethyl)benzamide 493. LCMS-ESI (m/z) calculated for C42H36F3N5O7S: 812; no ion observed, tR=11.03 min (Method 2).

Provenance & Evidence