Fluorescent Probes from Aromatic Polycyclic Nitrile Oxides: Isoxazoles versus Dihydro‐1λ3,3,2λ4‐Oxazaborinines

Autor: Dr. Mattia Moiola, Dr. Antonio Bova, Dr. Stefano Crespi, Dr. Misal G. Memeo, Prof. Mariella Mella, Prof. Herman S. Overkleeft, Dr. Bogdan I. Florea, Prof. Paolo Quadrelli
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: ChemistryOpen, Vol 8, Iss 6, Pp 770-780 (2019)
Druh dokumentu: article
ISSN: 2191-1363
DOI: 10.1002/open.201900137
Popis: Abstract Anthracenenitrile oxide undergoes 1,3‐dipolar cycloaddition reaction with propargyl bromide affording the expected isoxazole as single regioisomer, suitably synthetically elaborated and functionalized with a protected triple bond. The introduction of a bromine atom at the position C10 of the anthracene moiety allows for inserting a variety of aromatic and heterocyclic substituents through Suzuki coupling. A two‐way synthetic route can lead to simple isoxazole derivatives or, after N−O bond reductive cleavage and BF3 complexation, enamino ketone boron complexes. The photophysical properties of both the substituted isoxazoles and the corresponding boron complexes were investigated to show the potentialities for the employment as fluorescent tags in imaging techniques. The quite good quantum yield values confirm the suitability of these compounds in the cellular environment. Scope and limitations of the methodology are discussed.
Databáze: Directory of Open Access Journals
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