Several new 10-phenyl-[1,2,4]triazolo[1,5- b][2,7]naphthyridin-5(3 H)-one derivatives were synthesised by condensation of 2,3-diamino-4-phenyl-2,7-naphthyridin-1(2 H)-one with aldehydes and also with acid anhydrides. Their structures were confirmed by 1H NMR, 13C NMR, IR, mass spectra and elemental analysis. The key starting material 4-[a-cyano(phenyl)methyl]nicotinic acid was easily cyclised to give 3-amino-4-phenyl-1 H-pyrano[3,4- c]pyridin-1-one under alkaline conditions, the structure of which was confirmed by X-ray crystallography following conversion to the corresponding N,N-dimethylformamidine derivative.
通过 2,3-二
氨基-4-苯基-
2,7-萘啶-1(2H)-酮与
醛类以及酸酐的缩合,合成了几种新的 10-苯基-[1,2,4]三唑并[1,5-b][2,7]
萘啶-5(3H)-酮衍
生物。1H NMR、13C NMR、IR、质谱和元素分析证实了它们的结构。关键起始材料 4-[a-
氰基(苯基)甲基]
烟酸在碱性条件下很容易环化生成 3-
氨基-4-苯基-1 H-
吡喃并[3,4-c]
吡啶-1-酮。