Table of Content<br>1. Synthesis of N-sulfonyl-1,2,3-triazoles and related compounds<br>2. Transannulation of N-sulfonyl-1,2,3-triazoles with polar multiple bonds such as carbonyls and nitriles<br>3. Transannulation of N-sulfonyl-1,2,3-triazoles with non-polar multiple bonds such as alkenes, alkynes and allenes<br>4. Transannulations of N-sulfonyl-1,2,3-triazoles with Carbo/Heterocycles<br>5. Insertion of azavinyl carbenes to C-H/X-H bond<br>6. Insertion of azavinyl carbenes to C-X/X-X bond<br>7. Denitrogenative rearrangements of N-sulfonyl-1,2,3-triazoles<br>8. Denitrogenative transformations of NH- and N-fluoroalkyl-1,2,3-triazoles<br>9. Asymmetric perspective on denitrogenative transformation of 1,2,3-triazoles<br>10. Denitrogenative transformations of triazoloindoles<br>11. Metal-catalyzed denitrogenative transformations of pyridotriazoles<br>12. Metal-free denitrogenative transformations of pyridotriazoles<br>13. Denitrogenative transannulation of benzotriazoles<br>14. Denitrogenative transannulation of thiadiazoles<br>15. Denitrogenative transformations of benzotriazinones and related compounds<br>16. Denitrogenative transformations of 3-aminoindazoles<br>17. Denitrogenative transformations of tetrazoles and pyridotetrazoles<br>18. Radical denitrogenative transformations of polynitrogen heterocycles<br>19. Application of denitrogenative transformations in synthesis of natural products<br> <br>