One-Step Synthesis of Substituted 3,5-Dicyanospiro-4-(piperidine-4<sup>′</sup>)-1<i>H</i>,4<i>H</i>-dihydropyridine-2-thiolates and 2,6-Diamino-3,5-dicyanospiro-4-[(piperidine-4′) or (2′-oxoindole-3′)]-4<i>H</i>-thiopyrans
作者:Anatoliy M. Shestopalov、Alexander A. Shestopalov、Lyudmila A. Rodinovskaya、Anna V. Gromova
DOI:10.1080/10426500902855075
日期:2009.5.14
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 cyanoaceticacid 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