An efficient method for the reduction of aromatic azides to anilines via the Staudinger reaction using tri-n-butylphosphonium tetrafluoroborate with triethylamine in aqueous tetrahydrofuran solution is reported. The method enables the aromatic azido-selective reduction of 3-azido-5-(azidomethyl)benzene derivatives to efficiently afford anilines bearing an azidomethyl group.
synthetic routes to diazidobuildingblocks with different connectable groups were established on the basis of the sequential iridium-catalyzed C–H borylation and copper-catalyzed azidation of 1,3-disubstituted benzenes, followed by diverse azido-friendly functional-group transformations. These buildingblocks facilitate the rapid development of effective diazidophotoaffinitylabelingprobes that are useful