Investigations on the synthesis and properties of N-phenyl derivatives of 1,4-dioxo(1,4,5-trioxo)-1,2,3,4-tetra(1,2,3,4,5,6-hexa)hydropyrido-[3,4-d]pyridazines and allied compounds
作者:Helena Śladowska、Joanna Potoczek、Magdalena Sokowska、Grażyna Rajtar、Maria Sieklucka-Dziuba、Tomasz Kocki、Zdzislaw Kleinrok
DOI:10.1016/s0014-827x(98)00050-0
日期:1998.7
2-(1-Piperidino)- and 2-(4-methyl-1-piperazinyl)-6-methyl-3,4-pyridinedicarboximides (1, 2) react with N-phenylhydrazine yielding N-phenylamino-3,4-pyridinedicarboximides (7, 8). The same reaction with 1,6-dimethyl-2-oxo-1,2-dihydro- and 2-chloro-6-methyl-3,4-pyridinedicarboximides (3, 17) gives the salts of the corresponding N-phenylpyridopyridazines with phenylhydrazine (13, 18), which transform
2-(1-哌啶子基)-和2-(4-甲基-1-哌嗪基)-6-甲基-3,4-吡啶二甲酰亚胺(1,2)与N-苯肼反应生成N-苯基氨基-3,4-吡啶二甲酰亚胺(7、8)。与1,6-二甲基-2-氧代-1,2-二氢-和2-氯-6-甲基-3,4-吡啶二甲酰亚胺(3,17)的相同反应得到相应的N-苯基吡啶并哒嗪与苯肼的盐(13、18),其在80%乙酸中沸腾期间转化为N-苯基氨基酰亚胺(14、19)。化合物7、8和14异构化为相应的2-苯基-1,4-二氧代(1,4,5-三氧代)-1,2,3,4-四(1,2,3,4,5,6 -hexa)在C2H5ONa或CH3ONa的醇溶液中加热的影响下的氢吡啶并[3,4-d]哒嗪(9,10,15)。仅在酰亚胺19的情况下,在这些条件下形成2-和3-苯基异构体(20和21)。