• Title/Summary/Keyword: Quinolines

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Synthesis of Pyrazoloquinolines as Gastric $H^+/K^+$-ATPase Inhibitors

  • G. D. Kalayanov;Kang, S. K.;Cheon, H.G.;Lee, S.G.;Yum, E. K.;Kim, S. S.;Choi, J.-K.
    • Bulletin of the Korean Chemical Society
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    • v.19 no.6
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    • pp.667-671
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    • 1998
  • A series of 1-aryl-lH-pyrazolo[4,3-c]quinolines and 2-aryl-2H-pyrazolo[4,3-c]quinolines are prepared by reacting 3-acyl-4-chloroquinolines in ethanol or 3-acyl-4(lH)-quinolone in acetic acid with appropriate hydrazines as possible anti-ulcer agents. A regiospecific synthesis of 1-aryl-lH-pyrazolo[4,3-c]quinolines is also achieved. The central pyridine ring could be easily reduced by catalytic hydrogenation.

A Study of Antibacterial Activity of Some Novel 8-Methoxy-4-methyl-quinoline Derivatives

  • Singh, Sheoraj;Kumar, Vikas;Kumar, Ashok;Sharma, Shalabh;Dua, Piyush
    • Bulletin of the Korean Chemical Society
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    • v.31 no.12
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    • pp.3605-3610
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    • 2010
  • In the present study, some quinoline derivatives have been synthesized like 8-methoxy-4-methyl-2-amino-(3'-chloro-2'-oxo-4'-substituted aryl-1'-azetidinyl)quinolines 8-12 and 8-methoxy-4-methyl-2-amino-(2'-substituted aryl-4'-oxo-1',3'-thiazolidin-3'-yl) quinolines 13-17 from 8-methoxy-4-methyl-2-(substituted arylidenyliminoamino)-quinolines 3-7. The structural assignments of these compounds were based on spectral (IR, $^1H$-NMR, Mass) and elemental (C, H, N) analysis. Further, these compounds were evaluated for antibacterial activity against various bacterial strains. Three compounds 10, 11 and 16 were found to exhibit potent antibacterial activity as compared to the standard drug amphicillin.

An Efficient Synthesis of Substituted Quinolines via Indium(III) Chloride Catalyzed Reaction of Imines with Alkynes

  • Zhu, Mei;Fu, Weijun;Xun, Chen;Zou, Guanglong
    • Bulletin of the Korean Chemical Society
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    • v.33 no.1
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    • pp.43-47
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    • 2012
  • An efficient synthetic method for the preparation of quinolines through indium(III) chloride-catalyzed tandem addition-cyclization-oxidation reactions of imines with alkynes was developed. The processes can provide a diverse range of quinoline derivatives in good yields from simple imines and alkynes.