A Highly Enantio- and Diastereoselective Cu-Catalyzed 1,3-Dipolar Cycloaddition of Azomethine Ylides with NitroalkenesThis research was supported financially by the Major Basic Research Development Program (grant G 200077506), the National Natural Science Foundation of China, the Chinese Academy of Sciences, the Shanghai Committee of Science, and the Technology and Croucher Foundation of Hong Kong. We thank Professors L.-X. Dai, H. N. C. Wong, and T.-L. Ho for their helpful discussions.