反应详情

A mixture of 4,5-dichloronicotinonitrile (3.0 g, 17.3 mmol), glycine ethyl ester hydrochloride (7.2 g, 52.0 mmol) and sodium hydrogen carbonate (9.06 g, 104 mmol) in IMS (50 ml) was heated at reflux for 16 hours. The cooled reaction mixture was then partitioned between ethyl acetate and water, the organic layer washed with water then brine, dried (MgSO4) filtered and concentrated in vacuo. The resultant residue was triturated in diethyl ether to give the title compound as a buff solid (3.58 g, 86%). 1H NMR (CDCl3) 8.80 (1H, s), 8.36 (1H, s), 4.97 (2H, s, br), 4.44 (2H, q, J=7.0 Hz), 1.44 (3H, t, J=7.0 Hz).

1. temperaturewas heated
2. temperatureat reflux for 16 hours
3. customThe cooled reaction mixture
4. customwas then partitioned between ethyl acetate and water
5. washthe organic layer washed with water
6. dry with materialbrine, dried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe resultant residue was triturated in diethyl ether