反应详情

温度

100 °C

4,6-Dichloronicotinic acid ethyl ester 16 (500 mg, 2.27 mmol) is dissolved in anhydrous dioxane (10 mL) and aniline (0.66 mL, 7.72 mmol) is added. The reaction is stirred at 100° C. overnight. The solvent is removed in vacuo and the crude product is purified using flash chromatography (hexane:ethyl acetate=10:1) to give 6-chloro-4-phenylamino-nicotinic acid ethyl ester 17. 1H NMR (400 MHz, CDCl3) δ 9.77 (s, 1H), 8.70 (s, 1H), 7.33-7.37 (m, 2H), 7.15-7.21 (m, 3H), 6.80 (s, 1H), 4.31 (q, 2H), 1.34 (t, 3H).

1. customThe solvent is removed in vacuo
2. customthe crude product is purified