Diisopropylethylamine → tert-butyl 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)acetate

Participants

Reaction Steps

Prepared using General Procedure 20: To a stirring solution of tert-butyl 2-(N-(4-(N-hydroxycarbamimidoyl)benzyl)-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzamido)acetate INT-33 (104 mg, 0.169 mmol) and DIEA (47.0 μL, 0.254 mmol) in dioxane (4 mL) was added 4′-methyl-[1,1′-biphenyl]-4-carbonyl chloride (39.0 mg, 0.169 mmol) in dioxane (1 mL). After stirring at room temperature for 30 min, the reaction mixture was heated to 120° C. for 2 h. The reaction mixture was allowed to cool to room temperature then diluted with NaHCO3 (20 mL) and extracted with DCM (3×20 mL). The combined organic extracts were dried over MgSO4 and concentrated. The crude product was purified by column chromatography (EA/isohexanes) to yield 54 mg (40%) of tert-butyl 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)acetate INT-34. LCMS-ESI (m/z) calculated for C45H41F3N4O6: 791; no m/z observed, tR=1.70 min (Method 10).

Provenance & Evidence