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Chiral Chromium Salen@rGO as Multipurpose and Recyclable Heterogeneous Catalyst
Author(s) -
Abd El Sater Mariam,
Mellah Mohamed,
Dragoe Diana,
Kolodziej Emilie,
Jaber Nada,
Schulz Emmanuelle
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202101003
Subject(s) - catalysis , chromium , substrate (aquarium) , graphene , diene , cycloaddition , oxide , cyclohexene , chemistry , pyrene , combinatorial chemistry , polymer chemistry , organic chemistry , materials science , nanotechnology , oceanography , natural rubber , geology
The first immobilization of a pyrene‐tagged chromium salen complex through π‐π noncovalent interactions on reduced graphene oxide (rGO) is described. A very robust supported catalytic system is obtained to promote asymmetric catalysis in repeated cycles, without loss of activity or enantioselectivity. This specific behavior was demonstrated in two different catalytic reactions (up to ten reuses) promoted by chromium salen complexes, the cyclohexene oxide ring‐opening reaction and the hetero‐Diels‐Alder cycloaddition between various aldehydes and Danishefsky's diene. Furthermore, the chiral chromium salen@rGO has been found to be compatible with a multi‐substrate type use, in which the structure of the substrate involved is modified each time the catalyst is reused.