1 Ocak 2020 Dergi makalesi Açık Erişim

Cakmak, Osman; Okten, Salih; Alimli, Dilek; Ersanli, Cem Cuneyt; Taslimi, Parham; Kocyigit, Umit Muhammet

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    <subfield code="a">Regioselective routes are described for convenient preparation of novel piperazine/morpholine substituted quinoline derivatives at C-3, C-6 and C-8 starting with 3,6,8-tribromoquinoline (6) by nucleophilic substitution via conventional heating or microwave assisted reaction conditions. 3,6,8-Tribromoquinoline (6) was treated with piperazine and morpholine under microvawe irradiation, which selectively furnished 3-mopholinyl and 3-piperazinyl quinoline derivatives 7 and 8 in yields of 58% and 60%, respectively. On the other hand, the activation of benzene cycle of quinoline by nitration of 3,6,8-tribromoquinoline, giving 5-nitro-3,6,8-tribromoquinoline (18) in quantitative yield, was enabled. Then, the bromines at C-6 and C-8 were selectively exchanged by morpholine and piperazine via SNAr reactions. Thus, 6,8-dimopholinylquinoline (22) and 5-nitro-6,8-dipiperazinylquinoline (24), biologically valuable derivatives, were prepared in high yields (82% and 72%, respectively). The synthesized compounds were fully characterizated by H-1 NMR, C-13 NMR, 2D NMR, XRD, HRMS and IR spectra. The novel molecules had effective inhibition profiles against some metabolic enzymes. Also, they have the potential of drug candidates to treat of some diseases including glaucoma, epilepsy, Alzheimer's disease (AD), leukemia, and type-2 diabetes mellitus (T2DM). (C) 2020 Elsevier B.V. All rights reserved.</subfield>
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    <subfield code="u">Istanbul Rumeli Univ, Fac Arts &amp; Design, Dept Gastron, TR-34570 Istanbul, Turkey</subfield>
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