Selective alkylation of indazoles is still a highly challenging topic in chemistry and the synthesis of important molecules. Herein, a novel highly selective N2-alkylation of indazoles with diazo compounds is described in the presence of TfOH. Unlike the traditional metal- and base-catalysed version, this protocol highlights the regioselectivity of alkylation of indazoles and a metal-free catalysis
吲唑的选择性烷基化仍然是化学和重要分子合成中极具挑战性的课题。在此,描述了在 TfOH 存在下,吲唑与重氮化合物的新型高选择性N 2 -烷基化。与传统的金属和碱催化版本不同,该方案突出了吲唑烷基化的区域选择性和无金属催化体系,以高区域选择性( N 2 / N 1高达 100/0) 和出色的官能团耐受性。此外,成功地进行了克级合成以产生相应的产物。通过控制实验进行的机械研究提供了合理的机械建议。