反应详情

To a solution of ethyl 3-(4-(4-chloro-2-methoxyphenyl)-3-(4-hydroxyphenyl)thiophen-2-yl)propanoate (220 mg, 0.53 mmol) in EtOH (5 mL) was added NaOH (42 mg, 1.06 mmol), and the mixture was stirred at room temperature for 2 hours. The mixture was diluted with water, neutralized to pH=4-5, extracted with EtOAc, and concentrated to give 3-(4-(4-chloro-2-methoxyphenyl)-3-(4-hydroxyphenyl)thiophen-2-yl)propanoic acid (Scheme II, 12, X1=4-hydroxyphenyl, X2=4-chloro-2-methoxyphenyl) (127.42 mg, yield 62%). 1H NMR (DMSO-d6 400 MHz): δ 9.36 (br, 1H), 7.25 (s, 1H), 7.01 (d, J 8.0 Hz, 1H), 6.91-6.88 (m, 2H), 6.79 (d, J=8.4 Hz, 2H), 6.64 (d, J=8.4 Hz, 2H), 3.40 (s, 3H), 2.92 (t, J=7.2 Hz, 2H), 2.47 (t, J=7.2 Hz, 2H); MS (ESI): m/z [M+1]+=389.0.

1. extractionextracted with EtOAc
2. concentrationconcentrated