Dioxazolone has been attractive as an important synthon for a direct C–H amidation through a nitrene intermediate or Curtius rearrangement to form the isocyanate. However, the combination of two reaction models of dioxazolone has not been reported. Herein, a cobalt-catalyzed C–H and N–H functionalization of 1-arylpyrazolidinones with dioxazolones was developed. The dioxazolones acted as an amidated and carboxamidated reagent. Three C–N bonds were formed in a “one-pot” manner, which promoted the requirement of synthetic diversity.

中文翻译：

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钴 (II)-催化 1-芳基吡唑烷酮的 C-H 和 N-H 官能化，二恶唑酮作为双功能合成子

二恶唑酮作为一种重要的合成子很有吸引力，它可以通过氮烯中间体直接 C-H 酰胺化或 Curtius 重排形成异氰酸酯。然而，二恶唑酮的两种反应模型的组合尚未见报道。在此，开发了一种钴催化的 C-H 和 N-H 官能化 1-芳基吡唑烷酮与二恶唑酮。二恶唑酮用作酰胺化和羧酰胺化试剂。三个C-N键以“一锅”的方式形成，促进了合成多样性的要求。