反应详情

The objective compound was prepared by the same procedure for the intermediate 1, using a 2-(4-bromo-phenyl)-propionic acid (11.7 g, 48.3 mmol), SOCl2 (35.0 mL, 480 mmol), and 2-amino-4,6-dichloro-benzoic acid methyl ester (10.1 g, 45.9 mmol). After normal workup, the pure objective compound (9.31 g, 55%) was obtained as white solid by a flash column chromatography (n-hexane:EtOAc=10:1): 1H NMR (200 MHz, CDCl3) δ 1.58 (d, J=7.1 Hz, 3H, CH3), 3.75 (q, J=7.1 Hz, 1H, CH), 3.81 (s, 3H, CO2CH3), 7.15 (d, J=2.0 Hz, 1H, ArH), 7.20-7.53 (m, 4H, ArH), 8.41 (d, J=1.7 Hz, 1H, ArH), 9.16 (br s, 1H, NH).