A new route to synthesize 1-(2-pyridyl)indole scaffolds via the solvent-free, ruthenium(II)-catalyzed, chemo- and regioselective [2+2+2] cycloaddition reaction of diynes with N-cyanoindoles has
been developed with good ...
Introduction
N-Aryl-, 1-(2-pyridyl)- and 3-(2-thiopyridyl)indoles are ubiquitously found in various
pharmaceuticals, agrochemicals as shown in figure 1. Over the past decades, transition metal
catalyzed C-H activation ...