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  • Title: Copper-catalyzed highly efficient multicomponent reactions: synthesis of 2-(sulfonylimino)-4-(alkylimino)azetidine derivatives.
    Author: Xu X, Cheng D, Li J, Guo H, Yan J.
    Journal: Org Lett; 2007 Apr 12; 9(8):1585-7. PubMed ID: 17381100.
    Abstract:
    [reaction: see text] Under very mild conditions, functionalized 2-(sulfonylimino)-4-(alkylimino)azetidine derivatives were prepared in good to excellent yields via a copper-catalyzed multicomponent reaction of readily available terminal alkynes, sulfonyl azides, and carbodiimides without the assistance of a base. The mechanism may be through a [2 + 2] cycloaddition.
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