反应详情

The title compound was prepared by reaction of 2-chloro-4-(1-ethyl-propylamino)-6-methyl-nicotinic acid methyl ester with LiOH.H2O in a mixture of water and dioxane at room temperature. The desired product was acidified to pH 3 and extracted with ethyl acetate. The organic layer was dried and concentrated to dryness. The title compound was obtained as white crystals after titration with ethyl acetate. mp. 164–165° C.; anal. For C12H17Cl2O2 cacl. C, 56.14; H, 6.67; N, 10.91; found: C, 56.40; H, 6.53; H, 10.93.

1. extractionextracted with ethyl acetate
2. customThe organic layer was dried
3. concentrationconcentrated to dryness