Sie können Bookmarks mittels Listen verwalten, loggen Sie sich dafür bitte in Ihr SLUB Benutzerkonto ein.
Medientyp:
E-Artikel
Titel:
Bis-Cyclometalated Indazole and Benzimidazole Chiral-at-Iridium Complexes: Synthesis and Asymmetric Catalysis
Beteiligte:
Brunen, Sebastian;
Grell, Yvonne;
Steinlandt, Philipp S.;
Harms, Klaus;
Meggers, Eric
Erschienen:
MDPI AG, 2021
Erschienen in:
Molecules, 26 (2021) 7, Seite 1822
Sprache:
Englisch
DOI:
10.3390/molecules26071822
ISSN:
1420-3049
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>A new class of bis-cyclometalated iridium(III) catalysts containing two inert cyclometalated 6-tert-butyl-2-phenyl-2H-indazole bidentate ligands or two inert cyclometalated 5-tert-butyl-1-methyl-2-phenylbenzimidazoles is introduced. The coordination sphere is complemented by two labile acetonitriles, and a hexafluorophosphate ion serves as a counterion for the monocationic complexes. Single enantiomers of the chiral-at-iridium complexes (>99% er) are obtained through a chiral-auxiliary-mediated approach using a monofluorinated salicyloxazoline and are investigated as catalysts in the enantioselective conjugate addition of indole to an α,β-unsaturated 2-acyl imidazole and an asymmetric Nazarov cyclization.</jats:p>