Investigation the synthesis of multifunctionalized heterocyclic spiro derivatives via the reaction of isatin, ethyl cyanoacetate and an other active methylene compound. It has been found that refluxing of an ethanolic piperidine solution of equimolar ratios of isatin (Ia), ethyl cyanoacetate (II) and barbituric acid (IIIa) or thiobarbituric acid (IIIb) afforded a solid product whose structure was assumed, in accordance with elemental analysis and IR and 1H NMR spectra, to be VIIIa and VIIIb. Confirmation of the structures VIIIa and VIIIb follows from their preparation from compound IV, synthesized separately, and barbituric acids IIIa and IIIb in 1 : 1 molar ratio under the same reaction conditions.
通过对异吲哚、乙基氰乙酸酯和另一种活性亚甲基化合物的反应合成多官能杂环螺环衍生物的研究。发现,在等摩尔比的异吲哚(Ia)、乙基氰乙酸酯(II)和巴比妥酸(IIIa)或硫巴比妥酸(IIIb)的乙醇哌嗪溶液中回流,得到了一种固体产物,根据元素分析、红外光谱和1H核磁共振谱,认为其结构为VIIIa和VIIIb。VIIIa和VIIIb的结构确认来自于它们在相同反应条件下,通过分别合成的化合物IV和巴比妥酸IIIa、IIIb按照1:1摩尔比制备而成。