Synthesis of functionally substituted derivatives of thiazolo[4,5-f]quinoline, pyridazino[3,4-f] quinoline and 5-hydroxyquinoline based on 3-cyano-6-bromo-1,2,5,6,7,8-hexahydroquinoline-2,5-dione
作者:V. A. Azimov、N. P. Solov'eva、V. G. Granik
DOI:10.1007/bf02219036
日期:1994.8
interphase catalyst, triethylbenzylammonium chloride (TEBAC). Under these conditions, however, the reaction proceeded mainly in the direction of dehydrobromination and formation of 3-cyano-5-hydroxy-2-quinoline (VII) in 68% yield. The desired product, 3-cyano-6(diethoxycarbonyl)methyl-l,2,5,6,7~8-hexahydroquinoline-2,5-dione, was isolated in a yield of only 10%. Reaction of this compound with hydrazine hydrate
最近,文献中出现了关于噻唑并 [4,5-f] 喹啉衍生物显着强心活性的数据 [1]。在合成具有强心活性的 3-cyano-2-pyridone 系列衍生物的研究过程中 [2],在目前的工作中,我们进行了基于反应的噻唑并 [4,5-f] 喹啉系列成员的合成在 [1] 和 3-cyano-6-bromo1,2,5,6,7,8-hexahydroquinoline-215-dione (I) 与不同硫代酰胺的反应中开发。对于后者,我们选择了硫氰乙酰胺 (II) 和内酰胺衍生物:1-硫代氨基甲酰基甲基 I-2-吡咯烷酮 (IIIa)、-硫代-2 吡咯烷酮 (IIIb) 和 -己内酰胺 (IIIc),通过用 NH4HS 处理相应的 N-氰基甲基内酰胺获得[3],或(在 IIIb 的情况下)通过使吡拉西坦 1-氨基甲酰基-2-吡咯烷酮与五硫化二磷反应 [4]。在尝试重现获得溴代衍生物 I [1] 的已知方法时,我们遇到了重大困难:通过