Covalently linked dinuclear {(salen)Al} complexes catalyze the conjugate cyanation of,-unsaturated imides with several orders of magnitude greater reactivity over the mononuclear analogue, and with comparable enantioselectivity. Imides that were completely unreactive with homo- and heterobimetallic combinations of mononuclear catalysts can now be converted into the corresponding cyanation products with high enantiomeric excess.