Copper-Catalyzed Cascade Reactions of Substituted 4-Iodopyrazolecarbaldehydes with 1,2-Phenylenediamines and 2-Aminophenols
作者:Maloy Nayak、Sanjay Batra
DOI:10.1002/adsc.201000662
日期:2010.12.17
A new approach for the synthesis of novel annulated-pyrazoles is presented. This protocol includes an intermolecular condensation followed by a copper-mediated intramolecular CN or CO coupling reaction. The method is applied to a range of substituted 4-iodopyrazolecarbaldehydes which react with 1,2-phenylenediamines or 2-aminophenols to yield substituted 2,4- or 1,4-dihydrobenzo[b]pyrazolo[4,3-e][1
提出了一种合成新型环吡唑的新方法。该方案包括分子间缩合,然后进行铜介导的分子内CN或CO偶联反应。该方法适用于一系列取代的4-碘吡唑甲醛,它们与1,2-苯二胺或2-氨基苯酚反应生成取代的2,4-或1,4-二氢苯并[ b ]吡唑并[4,3- e ] [1 ,4]二氮杂卓或取代的2 H-或1 H-苯并[ b ]吡唑并[3,4- f ] [1,4]恶氮杂卓。