Acridinium Salts and Cyanoarenes as Powerful Photocatalysts: Opportunities in Organic Synthesis

Abstract

Sami Lakhdar received his PhD in 2006 from the Universities of Versailles and Monastir with Prof. F. Terrier and Prof. T. Boubaker.I n2 007, he joined the group of Prof. H. Mayr at the Ludwig Maximilians University (LMU; Germany) as an Alexander von Humboldt Postdoctoral Fellow.2 013-2019 he was aC NRS Associate Researcher( LCMT,C aen) and in 2020 became group leader at LHFA (Toulouse). His research interests focus on organic reactivity and visible-light-mediated carbonheteroatomb ond-forming reactions.H er eceived the Jean-Pierre Sauvage award from the Organic Chemistry Division of the French Chemical Society (2019).

Acridinium salts as photoredox organocatalysts for photomediated cationic RAFT and DT polymerizations of vinyl ethers

“…, a high excited-state oxidative power, and a long lifetime in the excited states with intramolecular charge separation. 40–44 A series of acridinium salts with various substituents at different positions have been synthesized to tune the photoredox catalytic abilities and have been used for various organic reactions. However, there have been no successful results on their use for cationic RAFT and DT polymerizations except for preliminary negative results with no polymerizations.…”

Katalysatoren immobilisieren

“…In den letzten zehn Jahren arbeiteten mehr Forschungsgruppen an Photoredoxkatalyse. [1][2][3][4][5][6][7][8][9][10] Die meisten photoaktiven Übergangsmetallkomplexe basieren auf Ruthenium oder Iridium und eignen sich in der typischen Konzentration im 1 Molprozent-Bereich nicht für großtechnische Anwendungen. Neue und effiziente recycelbare Materialien sind gefragt.…”

Tailoring the Reactivity of the Langlois Reagent and Styrenes with Cyanoarenes Organophotocatalysts under Visible‐Light

“…In this context, transition metal catalyzed direct trifluoromethylation has been employed for a long time to forge C-fluoroalkyl bonds. [2b] More recently, photocatalysis [5] turned out to be an attractive alternative to leverage the orthogonality of transition metal catalysis through the selective generation of a fluoroalkyl radical, which, in the presence of a suitable reactant, can lead the desired product. [6] Although a plethora of methodologies have been developed in the last decade for the selective fluoroalkylation of aliphatic alkenes and alkynes under photoredox conditions, [7] the use of styrene reactants turns out to be highly challenging.…”