Trapping Reactive Intermediates by Mechanochemistry: Elusive Aryl N‐Thiocarbamoylbenzotriazoles as Bench‐Stable Reagents

Monitoring of mechanochemical thiocarbamoylation by in situ Raman spectroscopy revealed the formation of aryl N‐thiocarbamoylbenzotriazoles, reactive intermediates deemed unisolable in solution. The first‐time isolation and structural characterization of these elusive molecules demonstrates the ability of mechanochemistry to access otherwise unobtainable intermediates and offers a new range of masked isothiocyanate reagents.