Chiral Zwitterions from Vicinal Diamines: Effective and Recoverable Asymmetric Enamine Catalysts

[摘要]：A series of chiral zwitterionic vicinal diamines were designed and synthesized. The zwitterionic catalysts demonstrated good reactivity and enantioselectivity in asymmetric enamine-based transformations and could be readily recycled and reused for four times.

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