Synthetic studies on KF-alumina-catalysed reaction of substituted and unsubstituted aryl-oxoketene dithioacetals and 1H-pyrazone-5(4H)-one: a convenient synthesis of pyrazolo[3,4-b]pyridine and pyrazolo[1,5-a]pyrimidine
作者:Pushpak Mizar、Bekington Myrboh
DOI:10.1016/j.tetlet.2009.04.020
日期:2009.6
The procedures described herein provide a facile method for the synthesis of pyrazolo[3,4-b]pyridine and pyrazolo[1,5-a]pyrimidine by reacting N-substituted or unsubstituted-pyrazol-5(4H)-one, aryl-oxoketene dithioacetals and alkyl amide. The products were obtained in moderate to good yield. The effects of the solvents and substitution have also been described.
本文所述的方法提供了通过使N-取代的或未取代的吡唑-5(4H)-一个芳基反应来合成吡唑并[3,4- b ]吡啶和吡唑并[1,5- a ]嘧啶的简便方法。-氧杂环丁烯二硫缩醛和烷基酰胺。以中等至良好的产率获得产物。还描述了溶剂和取代的作用。