Pyridine → N-(4-(2-acetamidopyridin-4-yloxy)-2-fluorophenyl)-N'-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide

Participants

Reaction Steps

A solution of N-(4-(2-aminopyridin-4-yloxy)-2-fluorophenyl)-N′-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide (61 mg, 0.14 mmol) in CH2Cl2 (3 mL) was treated with pyridine (0.058 mL, 0.72 mmol) and acetic anhydride (0.13 mL, 1.4 mmol). The resultant mixture was stirred at RT for 2 days. The reaction was quenched with saturated aqueous NaHCO3 and was further stirred for 2 h. The mixture was diluted with EtOAc (30 mL) and was washed with saturated aqueous NaHCO3 (20 mL), water (20 mL) and brine (20 mL). The mixture was concentrated in vacuo and purified by silica gel chromatography to provide N-(4-(2-acetamidopyridin-4-yloxy)-2-fluorophenyl)-N′-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide (46 mg, 69% yield). 1H NMR (400 MHz, DMSO-d6): δ10.56 (s, 1H), 10.54 (s, 1H), 9.96 (s, 1H), 8.18 (d, J=5.8 Hz, 1H), 7.92 (t, 1H), 7.65 (d, J=1.9 Hz, 1H) 7.59 (m, 2H), 7.24 (dd, J=11.2, 2.5 Hz, 1H), 7.15 (m, 2H), 7.01 (m, 1H), 6.68 (dd, J=5.7, 2.3 Hz, 1H), 2.02 (s, 3H), 1.60-1.52 (m, 4H); MS (ESI) m/z: 467.2 (M+H+).

Provenance & Evidence