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New 2-(Aryl/Heteroaryl)-6-(Morpholin-4-yl/Pyrrolidin-1-yl)-(4-Trifluoromethyl)quinolines: Synthesis via Buchwald–Hartwig Amination, Photophysics, and Biomolecular Binding Properties

Abstract

This work reports a successful synthesis of two new series of 2-(aryl/heteroaryl)-6-(morpholin-4-yl/pyrrolidin-1-yl)-(4-trifluoromethyl)quinolines via the Buchwald–Hartwig amination, at 60–88% yields, starting from 2-(aryl/heteroaryl)-6-bromo-4-trifluoromethyl-quinolines and heteroarylamines (morpholine and pyrrolidine). The 6-bromoquinoline precursors were obtained from an easy intramolecular cyclization reaction of (Z)-4-((4-bromophenyl)amino)-1,1,1-trifluoro-but-3-en-2-ones, which were previously prepared through the reaction of 4-methoxy-(aryl/heteroaryl)-1,1,1-trifluoroalk-3-en-2-ones with 4-bromoaniline. Photophysical analyses indicated intraligand and charge-transfer type transitions, in agreement with the aromatic structures of the heterocycle moieties. In the case of ct-DNA titrations (via the absorption and emission method), morpholinyl- and pyrrolydinyl-substituted quinolines had strong interactions with ct-DNA, which could be attributed to π-stacking and/or hydrogen-bonding interactions.

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Publication details

The article was received on 07 Mar 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01120F
Citation: New J. Chem., 2018, Accepted Manuscript
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    New 2-(Aryl/Heteroaryl)-6-(Morpholin-4-yl/Pyrrolidin-1-yl)-(4-Trifluoromethyl)quinolines: Synthesis via Buchwald–Hartwig Amination, Photophysics, and Biomolecular Binding Properties

    H. G. Bonacorso, M. B. Rodrigues, B. A. Iglesias, C. H. da Silveira, S. C. Feitosa, W. Rosa, M. A. P. Martins, C. P. Frizzo and N. Zanatta, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01120F

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