喹啉的研究:合成4 H,5 H,6 H,9 H-苯并[ ij ]吡喃并[2,3 - b ]喹啉-8-one,4 H-吡喃并[2,3 - b ]吡啶的新途径,2 H-吡喃-2-酮和吡喃并吡啶喹啉衍生物
摘要:
几种新的苯并[ IJ ]吡喃并[2,3- b ]喹嗪-8-酮5和4 ħ吡喃并[2,3- b ]吡啶8个衍生物由4-羟基喹啉的合成1。3-乙酰基-4-羟基-1-苯基-1 H-喹啉-2-一与二甲基甲酰胺二甲基缩醛反应,得到3-(3-二甲基亚氨基-丙烯酰基)-4-羟基-1-苯基-1 H-喹啉-2-一9。该产物与马尿酸和3-氧代戊二酸二乙酯反应,分别得到2 H-吡喃-2-酮13和吡喃并吡啶喹啉17。
3-Acyl-4-hydroxy-2(1H)-quinolones 5 are obtained by hydrolytic ring opening and subsequent decarboxylation from the corresponding pyrano[3,2-c]quinolin-2,5(6H)-diones 4, which in turn are easily obtained from 1:2 condensation of anilines 1 with diethyl malonate 2a or 1:1 condensation of diethyl alkyl- or arylmalonates 2b-e with 4-hydroxy-2(1H)-quinolones 3. Nitropyranoquinolinediones 6 furnish after ringopening 3-nitroacetyl-4-hydroxy-2(1H)quinolones 8. Pyranoquinolines 7 and 9 with acetyl- or aminosubstituents are hydrolyzed during basic ringopening to yield 5.
Synthesis and anti-parasitic activity of a novel quinolinone–chalcone series
作者:Marina Roussaki、Belinda Hall、Sofia Costa Lima、Anabela Cordeiro da Silva、Shane Wilkinson、Anastasia Detsi
DOI:10.1016/j.bmcl.2013.09.047
日期:2013.12
A series of novel quinolinone-chalcone hybrids and analogues were designed, synthesized and their biological activity against the mammalian stages of Trypanosoma brucei and Leishmania infantum evaluated. Promising molecular scaffolds with significant microbicidal activity and low cytotoxicity were identified. Quinolinone-chalcone 10 exhibited anti-parasitic properties against both organisms, being the most potent anti-L. infantum agent of the entire series (IC50 value of 1.3 +/- 0.1 mu M). Compounds 4 and 11 showed potency toward the intracellular, amastigote stage of L. infantum (IC50 values of 2.1 +/- 0.6 and 3.1 +/- 1.05 mu M, respectively). Promising trypanocidal compounds include 5 and 10 (IC50 values of 2.6 +/- 0.1 and 3.3 +/- 0.1 mu M, respectively) as well as 6 and 9 (both having IC50 values of <5 mu M). Chemical modifications on the quinolinone-chalcone scaffold were performed on selected compounds in order to investigate the influence of these structural features on antiparasitic activity. (C) 2013 Elsevier Ltd. All rights reserved.