Enantiopure [6]-Azairidahelicene by Dynamic Kinetic Resolution of a Configurationally Labile [4]-Helicene
Metadatos
Afficher la notice complèteAuteur
Pazos, Ariadna; Moreno Cruz, Carlos; Cuerva Carvajal, Juan Manuel; Rivilla, Ivan; P. Cossío, Fernando; Freixa, ZoraidaEditorial
Wiley Online Library
Materia
Circularly Polarized Luminescence Chiral-at-metal Complexes Helical Structures
Date
2024-04-24Referencia bibliográfica
Pazos, A. et. al. 63, e202406663. [https://doi.org/10.1002/anie.202406663]
Patrocinador
Projects PID2019-111281GBI00 and PID2020-113059GB-C21; Projects PID2022-139760NB-I00 and PID2022-137403NA-I00Résumé
A pair of enantiopure [6]-azairidahelicenes
incorporating chirality at the metal center and on the
helicenic ligand were synthesized by dynamic kinetic
resolution (dkr) of a configurationally labile [4]-helicenic
ligand (4-(2-pyridyl)-benzo[g]phenanthrene, L1H)
using bis-cyclometalated chiral-at-metal only iridium-
(III) precursors as chiral inductors. The origin of the
observed dkr is attributed to the different conformation
and stability of diastereomeric reaction intermediates
formed during the cyclometalation process. The isolated
enantiomers exhibited circularly polarized phosphorescence
(CPP), with j gphos j values of 1.8×10-3