Cl[C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][N:3]=1.[CH2:11]([NH2:13])[CH3:12]>>[CH2:11]([NH:13][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][N:3]=1)[CH3:12]6-Chloronicotinic acid (100 g, 0.63 mol) was treated with ethylamine (70% in water, 500 ml). The reaction was sealed in an autoclave and heated to 170° C. for 6 hours. The reaction mixture was evaporated, partially neutralised with concentrated HCl and the pH adjusted to 5 with glacial acetic acid. The solid product was filtered off and dried in vacuo for 18 hours to give 6-(ethylamino)nicotinic acid (87.8 g, 84%).
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