Highly Efficient Synthesis of N-Sulfonylamidines via Silver-Catalyzed or Metal-Free Thermally Promoted Denitrogenative Amination of N-Sulfonyl-1,2,3-triazoles
3-triazoles and amines is reported. This transformation undergoes silver-catalyzed or metal-free thermally promoted denitrogenation of N-sulfonyl-1,2,3-triazoles to afford N-sulfonylketenimine intermediates and subsequent nucleophilic addition with amines. The amine plays dual roles as base and nucleophile. A highly efficient synthesis of N-sulfonylamidines from N-sulfonyl-1,2,3-triazoles and amines is reported