“…The classical name reactions, such as Bischler indole synthesis [11,12], Fischer indole synthesis [13,14], Bartoli indole synthesis [15,16], have been widely used for indole synthesis. In recent years, efforts have been devoted to improve the Bischler indole synthesis [17,18,19,20,21,22,23]. Metal catalysts, including Rh [17], Ir [18], Ru [19], and Zn [20], have been applied to such transformations.…”