Microwave-enhanced Friedländer synthesis for the rapid assembly of halogenated quinolines with antibacterial and biofilm eradication activities against drug resistant and tolerant bacteria.

Medchemcomm

Department of Medicinal Chemistry , Center for Natural Products Drug Discovery and Development (CNPD3) , University of Florida, Gainesville , Florida 32610 , USA . Email: ; Tel: +1 352 273 7718.

Published: April 2017

Herein, we disclose the development of a catalyst- and protecting-group-free microwave-enhanced Friedländer synthesis which permits the single-step, convergent assembly of diverse 8-hydroxyquinolines with greatly improved reaction yields over traditional oil bath heating (increased from 34% to 72%). This rapid synthesis permitted the discovery of novel biofilm-eradicating halogenated quinolines (MBECs = 1.0-23.5 μM) active against MRSA, MRSE, and VRE. These small molecules exhibit activity through mechanisms independent of membrane lysis, further demonstrating their potential as a clinically useful treatment option against persistent biofilm-associated infections.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6072483PMC
http://dx.doi.org/10.1039/c6md00381hDOI Listing

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