Tetraalkylammonium Dichloroiodates as Iodinating Agents: Absence of Activity in Solid Phases and Superelectrophilic Activity in Sulfuric Acid

Abstract

In contrast to published results, tetraalkylammonium dichloroiodates (Alk4N+ICl2 -) cannot be iodinating reagents for arenes­ in solvent-free conditions. Nevertheless, tetraalkylammonium dichloroiodates in sulfuric acid solutions or in the presence of Ag2SO4 in H2SO4 possess superelectrophilic properties and act as very convenient and efficient iodinating agents for deactivated arenes­.