反应详情

To a solution of an approximately 1:1 mixture of 3-(hydroxymethyl)-6-methylaniline, (8.05 g, 58.8 mmol) (2) and 2,5-dimethylaniline in chloroform (290 mL), was added acetic anhydride (20 mL, 206 mmol) and potassium acetate (20 g, 202 mmol). The resulting mixture was heated to its reflux temperature for 2 hours. The mixture was then concentrated and purified by a flash column chromatography (1:1 of hexane-ethyl acetate) which also removed the by-product from Example 61 to give the title compound (12.02 g, 92%). TLC Rf: 0.52 (ethyl acetate); MS (electrospray) 222 (M+1); 1H N MR (CDCl3) δ 2.09 (s, 3H), 2.21 (s, 3H), 2.25 (s, 3H), 5.06 (s, 2H), 7.00 (br s, 1H, NH), 7.08 (d, 1H, J=7.6 Hz), 7.18 (d, 1H, J=7.6 Hz), 7.81 (s, 1H).

1. temperatureThe resulting mixture was heated to its
2. temperaturereflux temperature for 2 hours
3. concentrationThe mixture was then concentrated
4. custompurified by a flash column chromatography (1:1 of hexane-ethyl acetate) which
5. customalso removed the by-product from Example 61