dirhodium complex Rh2(esp)2, α-diazo dibenzothiophenium salts generate highly electrophilic Rh-coordinated carbenes, which evolve differently depending on their substitution pattern. Keto-moieties directly attached to the azomethinic carbon promote carbene insertion into one of the adjacent C–S bonds, giving rise to highly electrophilic dibenzothiopyrilium salts. This intramolecular pathway is not operative
N‐(Sulfonio)Sulfilimine Reagents: Non‐Oxidizing Sources of Electrophilic Nitrogen Atom for Skeletal Editing
作者:Tobias Heilmann、Juan M. Lopez‐Soria、Johannes Ulbrich、Johannes Kircher、Zhen Li、Brigitte Worbs、Christopher Golz、Ricardo A. Mata、Manuel Alcarazo
DOI:10.1002/anie.202403826
日期:2024.6.17
Under rhodium catalysis N-sulfonio(sulfilimines) act as sulfonitrene precursors. Reaction of such species with indenes presumably delivers N-sulfonio aziridines, which evolve to isoquinolines via electrocyclic ring expansion. Contrarily, 1-arycyclobutenes are transformed into 1-cyano-1-arylcyclopropanes via ringcontraction.