Synthetic Approaches to New Redox-Active Carbene Ligands View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2021-02-24

AUTHORS

I. A. Nikovskii, K. A. Spiridonov, A. A. Pavlov, Yu. V. Nelyubina, K. M. Karnaukh, A. V. Polezhaev

ABSTRACT

The design of new redox-switchable molecules requires the development of simple and efficient synthetic approaches. This study demonstrates the possibility of ortho-lithiation of ferrocenecarboxaldehyde (aryl)imines (Ia–Ic) followed by the reaction with ketones to give 1,2-disubstituted ferrocenes (IIa–IIc). These products, in turn, can be cyclized by treatment with trimethylsilyl triflate to give the cationic precursors of ferrocene-containing N-heterocyclic carbenes (IIIa–IIIc), in which the heterocycle is annulated to one of the ferrocene cyclopentadienyl ring. Treatment of IIIa–IIIc with a base in the presence of a source of rhodium afforded rhodium carbene complexes (IVa, IVb) in which the carbene ligand resembled cyclic alkylaminocarbenes in the electron-donor properties. Compounds Ib and IVa were studied by X-ray diffraction (CIF file CCDC nos. 2000413 and 2000414, respectively). More... »

PAGES

117-126

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1070328421020044

DOI

http://dx.doi.org/10.1134/s1070328421020044

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1135707818


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