trans-1,2-Diaminocyclohexane mesoporous silica for asymmetric catalysis: enhancement of chirality through confinement space by the plug effect.

trans-1,2-Diaminocyclohexane functionalized mesoporous silica was applied as an ideal catalyst for asymmetric Michael addition of various nitroalkane derivatives. Short channels and plugs in the pore structure offered chiral enhancement in Michael addition.