The oxoindole structural motif constitutes a central unit in a multitude of pharmaceutically relevant natural products and synthetic lead structures.[1] The often at the C-3 position disubstituted heterocycle is most of the times responsible for the excellent bioactivities of these compounds. Furthermore, oxoindoles are valuable building blocks towards other nitrogen-containing ring systems, such as indolines, that have a quaternary center at C-3.[ ...
