反应详情

6-(3,5-Dichloro-4-ethoxyphenylcarbamoyl)nicotinic acid (AAA-020) (19 mg, 109%) was prepared from methyl 6-(3,5-dichloro-4-ethoxyphenylcarbamoyl)nicotinate (3) (18 mg, 49 μmol) using a procedure essentially the same as in Step (iii) for AAA-013, except methanol (0.5 mL) was also added and the reaction mixture was stirred at RT overnight: m/z 353 [M−H]− (ES−). 1H NMR (400 MHz, DMSO-d6) δ: 11.12 (1H, s), 9.18 (1H, dd), 8.55 (1H, dd), 8.29 (1H, dd), 8.13 (2H, s), 4.06 (2H, q), 1.37 (3H, t).