Copper-Catalyzed (5+1) Annulation of Imidazolidines with Cyclopropenes: Synthesis of Functionalized 2-Vinylpiperazines
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Herein, we report a copper-catalyzed (5+1) annulation between imidazolidines and cyclopropenes, providing a modular, atom-economical, and efficient strategy for the synthesis of diverse functionalized 2-vinylpiperazines in moderate to good yields. This method ... ...
