Because silver is more affordable than other pricey transition metals (TM), has great selectivity and stability, and is ecologically friendly, it plays a significant role in organic synthesis. These metal-catalyzed cycloaddition processes, which are essential tools in synthetic chemistry, include silver-catalyzed events as a subset. Azomethine ylides are shown as the most prevalent resonance form with an iminium ion and a carbon-centered anion adjacent to it. They are nitrogen-based 1,3-dipoles. In general, a high temperature of up to 100 °C is needed for the Huisgen 1,3-dipolar cycloaddition of terminal alkynes with azides, which yields a mixture of 1,4- and 1,5-disubstituted triazole isomers. In a polymeric structure known as silver dicyanamide, metal ions are spirally connected by dicyanamide. With azomethine imine, the silver-catalyzed cycloaddition was also shown.
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Sorbonne University, France
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