Catalytic conjugate addition of indole to α,β-unsaturated ketones by Co(ClO4)2·6H2O/bis-Schiff base complexes

Co(ClO4)2·6H2O/bis-Schiff base complexes promoted the conjugate addition of indole to α,β-unsaturated ketones under mild conditions, giving the corresponding addition products with high yields. And the complex has been characterized with XRD and IR.