Supported cobalt complex-catalysed conjugate addition of indoles, amines and thiols to alpha,beta-unsaturated compounds

A highly active and reusable supported Co(II) complex on SBA-15 shows an excellent activity and selectivity to target products in aza- and thia-Michael conjugate additions of indoles, amines and thiols to alpha, beta-unsaturated compounds under solventless mild reaction conditions. The Co-catalyst was also highly reusable and comparably more active than related catalysts in the reaction.