An Efficient and Reusable Cobalt Nanocatalyst for the Synthesis of Bis(indolyl)methanes under Solvent-Free Conditions

This contribution discloses a simple and efficient procedure using environmentally benign supported cobalt nanocatalyst for the synthesis of bis(indolyl)methanes under solventfree conditions. The supported cobalt nanocatalyst exhibited excellent activity and stability and it could be reused for at least ten times without any loss of activity, providing an efficient and stable catalytic system for the synthesis of a number of important bis(indolyl)methanes.