Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume -, Issue -, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3cy00942d
Keywords
-
Categories
Ask authors/readers for more resources
In this study, the researchers found that the heteroleptic Ir(iii) complex 1, combined with N-(tert-butoxycarbonyl)-proline and cesium carbonate, can facilitate the hydrodehalogenation of reductively inert aryl halides under blue light irradiation. The in situ modified Ir-int structure leads to a bathochromic shift of excited triplet state absorption and phosphorescence bands. Free Ir-int ions are responsible for the hydrodehalogenation reaction of aryl halides.
In this study, we show that the hydrodehalogenation of reductively inert aryl halides is facilitated by the heteroleptic Ir(iii) complex [Ir(dF(CF3)ppy)(2)(dtbbpy)](+) (1) in the presence of N-(tert-butoxycarbonyl)-proline and cesium carbonate under irradiation with blue light. We observed in situ modification of 1 to yield intact (Ir-int) and degraded (Ir-deg) complexes. Ir-int complexes are formed through the functionalization of both the C<^>N and N<^>N ligands with alpha-amino radicals, formed via single-electron-oxidation of cesium carboxylate salt (N-Boc-Pro-OCs) derived from N-(tert-butoxycarbonyl)-proline by the photoexcited Ir complex. In this functionalization, electron-withdrawing fluorine atoms on the dF(CF3)ppy ligands are substituted. The destabilization of the HOMO of the structurally modified Ir-int results in a bathochromic shift of both the excited triplet state absorption and phosphorescence bands when compared to pristine 1. In the presence of excess N-Boc-Pro-OCs, the free Ir-int undergo rapid quenching via excited-state charge-transfer complex formation. The Ir-int(center dot -), after radical ion separation, are responsible for the hydrodehalogenation reaction of aryl halides.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available