tes and 2,6-diamino-3,5-dicyanospiro-4-[(piperidine-4′) or (2′ -oxoindole-3′)]-4H-thiopyrans using a multicomponent reaction of N-substituted piperidine-4-ones and isatins with derivatives of cyanoacetic acid is described. The regioselectivity of this reaction can be controlled by varying the substituents at the nitrogen atom of the piperidine-4-ones. The multicomponent reaction of N-alkylpiperidine-4-ones
一种新的一步法合成取代的 3,5-dicyanospiro-4(piperidine-4')-1H,4H-dihydropyridine-3-thiolates 和 2,6-diamino-3,5-dicyanospiro-4- [(piperidine-4') 或 (2'-oxoindole-3')]-4H-thiopyrans 使用 N-取代的
哌啶-4-ones 和
靛红与
氰乙酸衍
生物的多组分反应进行了描述。该反应的区域选择性可以通过改变
哌啶-4-酮氮原子上的取代基来控制。N-烷基
哌啶-4-酮与
丙二腈和
氰硫代乙酰胺的多组分反应得到螺-4-(1'-烷基
哌啶-4')-1H,4H-
二氢吡啶-2-
硫醇盐,而N-(酰基)的类似反应alkoxycarbonylpiperidine-4-ones 仅导致 spiro-4-(1' -(acyl)alkoxycarbonylpiperidine-4')-4H-thiopyrans。