Several new N4-substituted
2-methoxy(and 2-hydroxy)-1,5-naphthyridin-4-amines have been prepared from
ethyl 3-aminopyridine-2-carboxylate. 2,4-Dichloro-1,5-naphthyridine with methanolic sodium methoxide gave
4-chloro-2-methoxy-1,5-naphthyridine but with methanolic
hydrogen chloride afforded 4-chloro-1,5-naphthyridin-2-ol. The N4-substituted
1,5-naphthyridin-4-amines showed no significant antimalarial activity compared
to chloroquine or primaquine in a preliminary in vivo screen against Plasmodium vinckei vinckei
in mice.
从 2-甲氧基(和 2-羟基)-1,5-萘啶-4-胺
2-甲氧基(和 2-羟基)-1,5-萘啶-4-胺由 3-氨基吡啶-2-甲酸乙酯制备而成。
3-氨基吡啶-2-甲酸乙酯。2,4-二氯-1,5-萘啶与甲醇甲醇钠反应后得到
4-氯-2-甲氧基-1,5-萘啶,但用甲醇氯化氢则可得到 4-氯-2-甲氧基-1,5-萘啶。
氯化氢则得到 4-氯-1,5-萘啶-2-醇。N4 取代的
1,5-萘啶-4-胺的抗疟活性并不显著。
与氯喹或伯氨喹相比,N4-取代的 1,5-萘啶-4-胺在小鼠体内对 vinckei vinckei 疟原虫的初步体内筛选中未显示出明显的抗疟活性。
小鼠的初步体内筛选结果显示,与氯喹或伯氨喹相比,1,5-萘啶-4