Y(OTf)(3)-Catalyzed Diastereoselective [3+2] Cycloaddition of N-Tosyl-aziridines and Imines; Efficient Synthesis of Multisubstituted Imidazolidines

[摘要]：An efficient Y(OTf)(3)-catalyzed generation of azomethine ylides from donor-acceptor aziridines and their [3+2] cycloaddition with imines was developed. The method provides facile access to multisubstituted imidazolidines, which have been extensively used in organic synthesis. Furthermore, a three-component reaction on a gram scale and an asymmetric variation were also developed in this work.

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