反应详情

To a solution of 5-(3-(4-chloropyrimidin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-oxadiazol-2-amine (500 mg, 0.85 mmol) and 2-fluorophenylboronic acid (143.5 mg, 1.02 mmol) in p-dioxane/H2O (3:1, 15 mL) was added K2CO3 (235.5 mg, 1.71 mmol) and Pd(PPh3)4 (49 mg, 0.0427 mmol). The reaction was heated at reflux for 24 h, quenched with H2O and extracted with EtOAc. The combined organic layers were dried, filtered and concentrated. The residue was purified with silica gel chromatography (eluting with 50% EtOAc in Hex) to give to 5-(3-(4-(2-fluorophenyl)pyrimidin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-oxadiazol-2-amine (400 mg, 72.8%). MS (ESI, pos. ion) m/z: 647.1 (M+1); 1H-NMR (400 MHz, DMSO-d6): δ 9.43 (s, 1H), 9.06-8.97 (m, 2H), 8.42-8.17 (m, 2H), 8.12-8.03 (m, 3H), 7.91 (dd, J=8, 1.6 Hz, 1H), 7.65-7.53 (m, 5H), 7.46-7.40 (m, 4H), 7.28 (m, 2H), 6.88 (d, J=8 Hz, 2H), 4.35 (d, J=8 Hz, 2H), 3.72 (s, 3H), 2.33 (s, 3H).

1. temperatureThe reaction was heated
2. temperatureat reflux for 24 h
3. customquenched with H2O
4. extractionextracted with EtOAc
5. customThe combined organic layers were dried
6. filtrationfiltered
7. concentrationconcentrated
8. customThe residue was purified with silica gel chromatography (eluting with 50% EtOAc in Hex)