反应详情

To tert-butyl 2-(4-(4-((4-chlorophenethyl)carbamoyl)phenoxy)-3-cyanophenyl)acetate (4.40 g, 8.96 mmol) in DCM (20 ml) was treated with TFA (20 ml). After stirring for 2 hours. The reaction mixture was concentrated and the crude material was purified by silica gel chromatography using a gradient of 0.5% MeOH/DCM containing 0.5% AcOH to 10% MeOH/DCM containing 0.5% AcOH to provide 2-(4-(4-((4-chlorophenethyl)carbamoyl)phenoxy)-3-cyanophenyl)acetic acid (3.30 g, 84.7% yield). 1H NMR (400 MHz, CD3OD) 7.85 (d, 2H), 7.65 (s, 1H), 7.45 (d, 1H), 7.35 (s, 1H), 7.25 (d, 2H), 7.20 (d, 2H), 7.10 (d, 2H), 6.95 (d, 1H), 3.62 (m, 4H), 2.90 (t, 2H).

1. concentrationThe reaction mixture was concentrated
2. customthe crude material was purified by silica gel chromatography