反应详情

10% Pd/C (2.21 g, 2.08 mmole) was added to a solution of 2-[2-(4-methoxyphenyl)ethenyl]nicotinic acid (5.31 g, 20.80 mmole) and 1.0 N NaOH (23 mL, 23 mmole) in H2O (81 mL), and the mixture was shaken at RT under H2 (50 psi) on a Parr apparatus. After 4.5 hr, the mixture was filtered through celite®, and the filtrate was acidified to pH 5 with glacial acetic acid. The solid was collected by suction filtration, washed with H2O, and dried in high vacuum at 45° C. to afford the title compound (4.50 g, 84%) as an off-white solid: 1H NMR (400 MHz, DMSO-d6) δ 8.65 (dd. J=4.7, 1.7 Hz, 1H), 8.15 (dd, J=7.8, 1.7 Hz, 1H), 7.35 (dd, J=7.8, 4.7 Hz, 1H), 7.13 (d, J=8.5 Hz, 2H), 6.84 (d, J=8.5 Hz, 2H), 3.71 (s, 3H), 3.25-3.40 (m, 2H), 2.82-2.93 (m, 2H).

1. filtrationthe mixture was filtered through celite®
2. filtrationThe solid was collected by suction filtration
3. washwashed with H2O
4. customdried in high vacuum at 45° C.