AbstractA highly diastereoselective catalyst-free multicomponent Mannichreaction between cyclohexanone, aromatic aldehydes and amines in cyclohexane is described. The doubleMannichreaction of diamines and two equivalents of aldehydes and cyclohexanone gave the novel bis(β-aminocarbonyl) compounds. Reactions proceeded in good to high yields with an excellent diastereoselectivity. The best selectivity