Utilization of Aryl(TMP)iodonium Salts for Copper-Catalyzed <i>N</i>-Arylation of Isatoic Anhydrides: An Avenue to Fenamic Acid Derivatives and <i>N,N</i>′-Diarylindazol-3-ones
isatoic anhydrides with unsymmetrical iodonium salts at room temperature. The developed catalytic protocol is mild and operationally simple, and aryl(TMP)iodonium trifluoroacetate is employed as the arylating partner. The methodology offers the broad applicability of both structurally and electronically diverse aryl groups from aryl(TMP)iodonium salts to access N-arylated isatoic anhydrides in moderate
在此,我们报告了一种在室温下用不对称碘盐对铜催化的靛红酸酐进行N-芳基化的通用方法。开发的催化方案温和且操作简单,芳基(TMP)三氟乙酸碘用作芳基化伙伴。该方法提供了从芳基 (TMP) 碘盐中结构和电子不同的芳基基团的广泛适用性,以中等至优异的产率 (53–92%)获得N-芳基化靛红酸酐。此外,取代的靛红酸酐也同样符合该协议。为了证明N -arylation 过程的合成效用,我们还报告了一种生物相关的灭酸衍生物的替代方法和N , N' -diarylindazol-3-ones 在一锅法经济体系中。此外,还说明了氟灭酸的放大合成。
One-Pot, Multistep Reactions for the Modular Synthesis of <i>N</i>,<i>N</i>′-Diarylindazol-3-ones
作者:Shuai Liu、Liang Xu、Yu Wei
DOI:10.1021/acs.joc.8b02548
日期:2019.2.1
synthesis of N,N′-diarylindazol-3-ones has been developed using readily available isatoic anhydrides, aryl amines, and aryl boronic acids. A Cu-catalyzed oxidative C–N cross-coupling and dehydrogenative N–N formation sequence under an air atmosphere affords indazol-3-one derivatives in good to excellent yields. Such process merges well with the preceding decarboxylative amination reaction, resulting