ChemInform Abstract: Asymmetric Construction of Spirocyclic Pyrrolidine‐thia(oxa)zolidinediones via N, O‐Ligand/Cu(I) Catalyzed 1, 3‐Dipolar Cycloaddition of Azomethine Ylides with 5‐Alkylidene Thia(oxa)zolidine‐2, 4‐diones. Issue 7 (January 2016)