Alazet, SebastienPreindl, JohannesSimonet-Davin, RaphaelNicolai, StefanoNanchen, AnnikMeyer, ThierryWaser, JeromeSimonet Davin, RaphaelPreindl, Johannes2018-12-282018-12-282018-12-282018-09-1510.1021/acs.joc.8b02068https://infoscience.epfl.ch/handle/20.500.14299/153223WOS:000447118100085Azides are building blocks of increasing importance in synthetic chemistry, chemical biology, and materials science. Azidobenziodoxolone (ABX, Zhdankin reagent) is a valuable azide source, but its safety profile has not been thoroughly established. Herein, we report a safety study of ABX, which shows its hazardous nature. We introduce two derivatives, tBu-ABX and ABZ (azidobenziodazolone), with a better safety profile, and use them in established photoredox- and metal-mediated azidations, and in a new ring-expansion of silylated cyclobutanols to give azidated cyclopentanones.text::journal::journal article::research article