A versatile copper-catalyzed [3 + 1 + 1] annulation of oximes and isocyanates with AgNO₃ is described. In this conversion, AgNO₃ and isocyanates instead of conventional azide or diazonium reagents were used as the nitrogen source. This three-component transformation was achieved by cleaving N–O/C–H/C–N bonds and building C═N/N–N bonds, which provides a strategy to prepare N-2-aryl-1,2,3-triazoles with a good substrate and functional compatibility.

中文翻译：

---

AgNO3 作为氮源用于铜催化异氰酸酯环化肟类化合物：生成 N-2-Aryl-1,2,3-三唑的简便途径

描述了一种多功能的铜催化 [3 + 1 + 1] 肟和异氰酸酯与 AgNO ₃的环化。在该转化中，AgNO ₃和异氰酸酯代替传统的叠氮化物或重氮试剂被用作氮源。这种三组分转化是通过裂解 N-O/C-H/C-N 键和构建 C=N/N-N 键来实现的，这为制备N -2-芳基-1,2,3-提供了一种策略三唑类具有良好的底物和功能相容性。