反应详情

A solution of ethyl 2-benzamidoisonicotinate (1.38 g, 5.09 mmol) and lithium hydroxide monohydrate (1.07 g, 24.45 mmol) in a mixture of tetrahydrofuran (30 mL) and water (15 mL) was stirred at ambient temperature for 4 hours and the organic solvent was removed in vacuo. The aqueous solution was acidified with 10% aqueous hydrochloric acid solution until pH 7. The colorless solid was collected and dried in vacuo to give 2-benzamidoisonicotinic acid as a colorless solid (1.10 g, 89%): 1H NMR (300 MHz, DMSO-d6) δ 13.69 (s, 1H), 11.95 (s, 1H), 8.71 (s, 1H), 8.57-8.56 (m, 1H), 8.05-8.03 (m, 2H), 7.61-7.50 (m, 4H); MS (ES+) m/z 243.1 (M+1).

1. customthe organic solvent was removed in vacuo
2. customThe colorless solid was collected
3. customdried in vacuo