Efficient synthesis of 2-aryl-2<i>H</i>-indazoles by base-catalyzed benzyl C–H deprotonation and cyclization
作者:Guo-Qing Jin、Wen-Xia Gao、Yun-Bing Zhou、Miao-Chang Liu、Hua-Yue Wu
DOI:10.1039/d0cc05862a
日期:——
A straightforward and efficient method for the preparation of 2-aryl-2H-indazoles from ortho-alkyl substituted azoxybenzenes is presented. The reaction proceeds through base-catalyzed benzyl C–H deprotonation and cyclization to afford 2-aryl-2H-indazoles in good yields. This synthetic strategy can be applied to the construction of several fluorescent and bioactive molecules.
提出了一种由邻烷基取代的z氧基苯制备2-芳基-2 H-吲唑的直接有效的方法。该反应通过碱催化的苄基CH脱质子化和环化反应进行,以高收率得到2-芳基-2 H-吲唑。这种合成策略可以应用于几种荧光和生物活性分子的构建。