Oxalyl chloride → 4-((N-(2-(tert-butoxy)-2-oxoethyl)-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzamido)methyl)phenyl 4-(heptyloxy)benzoate

Participants

Reaction Steps

Prepared using General Procedure 7: To 2-(4-methoxy-2-(trifluoromethyl)phenyl)acetic acid (299 mg, 1.28 mmol) in DCM (5 mL) and DMF (20 μL) was added oxalyl chloride (0.117 mL, 1.34 mmol). After stirring at room temperature for 30 min, 4-((4-amino-N-(2-(tert-butoxy)-2-oxoethyl)benzamido)methyl)phenyl 4-(heptyloxy)benzoate INT-4 (700 mg, 1.22 mmol) and TEA (0.424 mL, 3.05 mmol) in DCM (10 mL) were added. The reaction was stirred for 1 h then diluted with DCM (100 mL) and washed with NaHCO3 (100 mL). The crude product was purified by chromatography to provide 555 mg (58%) of 4-((N-(2-(tert-butoxy)-2-oxoethyl)-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzamido)methyl)phenyl 4-(heptyloxy)benzoate INT-6. LCMS-ESI (m/z) calculated for C44H49F3N2O8: 791; no m/z observed, tR=3.28 min (Method 4).

Provenance & Evidence