反应详情

To a stirred solution of tert-butyl 2-(3-cyano-4-(4-(3,4-dichlorobenzamido)phenoxy)phenyl)propanoate (25 mg, 0.049 mmol) in DCM (1 ml) was added TFA (250 μl). The reaction was stirred at ambient temperature for 4 hours and then concentrated. The crude product was purified via preparative TLC (5% MeOH/DCM) to give 2-(3-cyano-4-(4-(3,4-dichlorobenzamido)phenoxy)phenyl)propanoic acid (0.0174 g, 0.0382 mmol, 78%). 1H NMR (400 MHz, CDCl3): 8.04 (bs, N—H), 7.96 (s, 1H), 7.64-7.71 (m, 3H), 7.61 (s, 1H), 7.55 (d, J=7.7 Hz, 1H), 7.44 (dd, J=8.6, 2.2H; 1H), 7.08 (d, J=8.9 Hz, 2H), 6.83 (d, J=8.5 Hz, 1H), 3.74 (q, J=7.4 Hz, 1H), 1.53 (d, J=6.9 Hz, 3H).

1. concentrationconcentrated
2. customThe crude product was purified via preparative TLC (5% MeOH/DCM)