反应详情

Compound 1 (571 mg, 2.91 mmol, 1.00 eq) was dissolved in ethanol (12 mL) and 1N NaOH (6 mL) was added. The mixture was refluxed for 18 h and after cooling the reaction was neutralized with 1N HCl (6 mL) and the reaction was concentrated in vacuo. The crude reaction was dissolved in 10% MeOH/CH2Cl2 and the undissolved salt was filtered off and the solvents were removed in vacuo to afford the title compound as a pale-yellow solid: 1H NMR (400 MHz, DMSO-d6) δ 8.47 (d, J=2.4 Hz, 1H), 8.44 (d, J=4.7 Hz, 1H), 7.75 (d, J=7.7 Hz, 1H), 7.60-7.48 (m, 4H), 7.36 (dd, J=8.0, 1.9 Hz, 1H)); ES-MS [M+1]+: 216.1.

1. temperatureThe mixture was refluxed for 18 h
2. temperatureafter cooling the reaction
3. concentrationthe reaction was concentrated in vacuo
4. customThe crude reaction
5. filtrationthe undissolved salt was filtered off
6. customthe solvents were removed in vacuo