Synthesis and antiplasmodial evaluation of aziridine–(iso)quinoline hybrids and their ring-opening products
作者:Stéphanie Vandekerckhove、Sofie De Moor、Dries Segers、Carmen de Kock、Peter J. Smith、Kelly Chibale、Norbert De Kimpe、Matthias D'hooghe
DOI:10.1039/c3md20377h
日期:——
Aziridineâ(iso)quinoline hybrid systems were prepared as novel synthetic intermediates en route to functionalized (iso)quinolines with potential antimalarial activity. Various quinolinecarboxaldehydes were converted into quinolineâaziridineâpyrazole, âpyridazinone or âpyrimidinone hybrids, and the three-membered azaheterocyclic moiety in these compounds was finally subjected to ring opening by either methanol or water to provide the corresponding functionalized quinolines. In addition, 5-hydroxyisoquinoline was used for the preparation of isoquinolineâaziridine chimeras, which were further transformed into a variety of functionalized isoquinolines via regioselective aziridine ring opening by various nucleophiles. Antiplasmodial evaluation of these new aziridineâ(iso)quinoline hybrids and their ring-opening products revealed micromolar potency (0.22â30 μM) for all representatives against a chloroquine-sensitive strain of the malaria parasite Plasmodium falciparum. The six most potent compounds also showed micromolar activity against a chloroquine-resistant strain of P. falciparum with IC50-values ranging between 1.02 and 17.58 μM.