反应详情

温度

0 °C

A solution of (5-chloropyridin-2-yl)methanamine hydrochloride (1.0 g, 5.31 mmol) in formic acid (5.09 g, 4.24 mL, 106 mmol) was refluxed at 110° C. After 20 h the reaction was cooled to 0° C. and 25% ammonium hydroxide in water was added until pH˜9 was reached. The mixture was diluted with water and then extracted into dichloromethane (3×). The organic layers were combined and dried (MgSO4), filtered and concentrated in vacuo. This was used directly in the next step without further purification. 1H NMR (CDCl3) δ: 8.53 (s, 1H), 8.35 (s, 1H), 7.69 (m, 1H), 7.65 (m, 1H), 4.64 (d, J=5.3 Hz, 2H), 4.0 (s, 1H).

1. extractionextracted into dichloromethane (3×)
2. dry with materialdried (MgSO4)
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThis was used directly in the next step without further purification