One-Step Synthesis of Substituted 6-Amino-5-cyanospiro-4-(piperidine-4‘)- 2<i>H</i>,4<i>H</i>-dihydropyrazolo[3,4-<i>b</i>]pyrans
作者:Anatoliy M. Shestopalov、Yuliya M. Emeliyanova、Aleksandr A. Shestopalov、Lyudmila A. Rodinovskaya、Zukhra I. Niazimbetova、Dennis H. Evans
DOI:10.1021/ol0102747
日期:2002.2.1
condensation of 4-piperidinones (7), 5-pyrazolones (8), and malononitrile (4) proceeds chemically and electrochemically and is a convenient one-step means of synthesis of substituted 6-amino-5-cyanospiro-4-(piperidine-4')-2H,4H-dihydropyrazolo[3,4-b]pyrans (12). The electrochemical reactions proceed under milder conditions and with yields 12-15% greater than those of the reactions catalyzed by chemical
Cross-condensation of derivatives of cyanoacetic acid and carbonyl compounds. Part 1: Single-stage synthesis of 1′-substituted 6-amino-spiro-4-(piperidine-4′)-2 H ,4 H -pyrano[2,3- c ]pyrazole-5-carbonitriles
作者:Anatoliy M Shestopalov、Yuliya M Emeliyanova、Aleksandr A Shestopalov、Lyudmila A Rodinovskaya、Zukhra I Niazimbetova、Dennis H Evans
DOI:10.1016/s0040-4020(03)01178-5
日期:2003.9
To develop a method of synthesis of the potentially physiologically active compounds, 1′-substituted 6-amino-spiro-4-(piperidine-4′)-2H,4H-pyrano[2,3-c]pyrazoles, we studied the three-component condensation of substituted piperidin-4-ones, malononitrile and pyrazolin-5-ones. It was found that the electrochemical method of synthesis is more regioselective, the products of the reaction are analytically
为了研究一种潜在的具有生理活性的化合物的合成方法,我们研究了1'-取代的6-氨基-螺-4-(哌啶-4')-2 H,4 H-吡喃并[2,3- c ]吡唑取代的哌啶-4-酮,丙二腈和吡唑啉-5-酮的三组分缩合。发现合成的电化学方法更具区域选择性,反应产物是分析纯的,不需要进一步重结晶。