Homochirality is a fundamental feature of all living organism. It is well known that a pair of enantiomers of chiral drug molecules, whose structures have a non-superimposable mirror-image relationship to each other, will probably exert different, or even opposite influences in pharmacological activity, metabolism and toxicity. Therefore, the selective synthesis of a pair of enantiomers of given chiral molecules not only is a prominent task in asymmetric synthesis, but also has significant impacts in pharmaceutical chemistry and materials science.