functionalization of indoles with arylboronic acids is achieved using palladium supported on carbon as a reusable heterogeneous catalyst in the presence of an oxidant under mild conditions. The current protocol formed exclusive C-2 selective products without the aid of any ligand or directing group. The catalyst is reusable for up to four catalytic cycles with the retention of catalytic efficiency.
在温和条件下,在氧化剂存在下,使用负载在碳上的
钯作为可重复使用的多相催化剂,可以实现
吲哚与芳基
硼酸的直接C(sp 2)–H键官能化。目前的方案在没有任何
配体或指导基团的帮助下形成了排他的C-2选择性产物。该催化剂可重复使用多达四个催化循环,同时保持催化效率。