Trifluoromethylated N‐ acylhydrazones are used as dipolarophiles to perform 1,3‐dipolar cycloadditions with azomethine ylides to afford trifluoromethylated 1,2,4,5‐tetrasubstituted imidazolidines in good yields under mild conditions. The role switch of the trifluoromethylated N‐acylhydrazones demonstrates that they are versatile trifluoromethyl building blocks for CF₃‐containing heterocycles.

中文翻译：

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[3 + 2]三氟甲基化的N-酰基hydr与偶氮甲磺酸盐的环加成反应：三氟甲基化的咪唑烷的合成

三氟甲基化的N-酰基hydr用作双极性亲和剂，可与偶氮甲亚胺进行1,3-偶极环加成反应，从而在温和的条件下以高收率获得三氟甲基化的1,2,4,5-四取代的咪唑烷。三氟甲基化的N-酰基hydr的角色转换表明，它们是用于含CF ₃杂环的通用三氟甲基构件。