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Cover Feature: Control over the Redox Cooperative Mechanism of Radical Carbene Transfer Reactions for the Efficient Active‐Metal‐Template Synthesis of [2]Rotaxanes (Chem. Eur. J. 35/2020)
Author(s) -
Alcântara Arthur F. P.,
Fontana Liniquer A.,
Almeida Marlon P.,
Rigolin Vitor H.,
Ribeiro Marcos A.,
Barros Wdeson P.,
Megiatto Jackson D.
Publication year - 2020
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.202000896
Subject(s) - carbene , porphyrin , chemistry , redox , rotaxane , photochemistry , radical , polymer chemistry , metal , combinatorial chemistry , radical ion , ion , organic chemistry , catalysis , supramolecular chemistry , molecule
Radical carbene transfer reactions promoted by macrocyclic Co II –porphyrinates bearing nitrogen‐based axial ligands were used to assemble asymmetrical [2]rotaxanes through the active‐metal‐template technique. Careful control of the reaction conditions and proper choice of axial ligands enable formation of rotaxanes in up to 95% yield, while precluding formation of non‐interlocked byproducts and total suppression of radical proton abstraction and carbene dimerization side reactions. The present study provides a detailed investigation on how to control the redox cooperative mechanism between the Co II ion in the porphyrin core and the radical carbene species to favor rotaxane formation. More information can be found in the Full Paper by J. D. Megiatto et al. on page 7808.