Trifluoroacetic acid → 2-(N-(4-((4-cyclohexylbenzoyl)oxy)benzyl)-4-(2-(4-methoxyphenyl)acetamido)benzamido) acetic acid

Participants

Reaction Steps

Prepared using General Procedures 2 and 8: To a stirring solution of 4-cyclohexylbenzoic acid (24 mg, 0.119 mmol) in DCM (0.5 mL) were added DMF (1 drop) and oxalyl chloride (0.011 mL, 0.127 mmol). The reaction mixture was stirred at room temperature for 2 h. To this mixture was added a solution of tert-butyl 2-(N-(4-hydroxybenzyl)-4-(2-(4-methoxyphenyl)acetamido)benzamido)acetate INT-7 (40 mg, 0.079 mmol) and TEA (0.022 mL, 0.159 mmol) in DCM (1 mL). The reaction was stirred at room temperature for 18 h then TFA (1 mL) was added. After stirring for 2 h, the solvent was concentrated and the product was purified by preparative HPLC to provide to afford 22.2 mg (44%) of 2-(N-(4-((4-cyclohexylbenzoyl)oxy)benzyl)-4-(2-(4-methoxyphenyl)acetamido)benzamido) acetic acid 39. LCMS-ESI (m/z) calculated for C38H38N2O7: 634; found 633 [M−H]−, tR=8.92 min (Method 4). 1H NMR (400 MHz, DMSO) δ 10.30 (s, 1H), 8.04 (d, J=7.7 Hz, 2H), 7.64 (d, J=8.2 Hz, 2H), 7.45 (t, J=7.0 Hz, 3H), 7.39-7.26 (m, 3H), 7.24 (d, J=8.4 Hz, 4H), 6.88 (d, J=8.1 Hz, 2H), 4.62 (d, J=36.7 Hz, 2H), 3.94 (d, J=31.7 Hz, 2H), 3.72 (s, 2H), 3.57 (s, 3H), 2.63 (t, J=10.7 Hz, 1H), 1.76 (dd, J=36.3, 11.5 Hz, 5H), 1.53-1.16 (m, 5H).

Provenance & Evidence