Kallitsakis MG, Carotti A, Catto M, Peperidou A, Hadjipavlou-Litina DJ, Litinas KE. Synthesis and Biological Evaluation of Novel Hybrid Molecules Containing Purine, Coumarin and Isoxazoline or Isoxazole Moieties.
THE OPEN MEDICINAL CHEMISTRY JOURNAL 2017;
11:196-211. [PMID:
29387274 PMCID:
PMC5748833 DOI:
10.2174/1874104501711010196]
[Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/27/2017] [Accepted: 10/30/2017] [Indexed: 12/01/2022]
Abstract
Introduction:
The 1,3-dipolar cycloaddition reactions of nitrile oxides formed in situ (in the presence of NCS and Et3N) from the oximes of (purin-9-yl)acetaldehyde or (coumarinyloxy)acetaldehyde with allyloxycoumarins or 9-allylpurines, respectively resulted in 3,5-disubstituted isoxazolines. The similar reactions of propargyloxycoumarins or 9-propargylpurines led to 3,5-disubstituted isoxazoles by treatment with PIDA and catalytic amount of TFA.
Methods:
The new compounds were tested in vitro as antioxidant agents and inhibitors of soybean lipoxygenase LO, AChE and MAO-B.
Results:
The majority of the compounds showed significant hydroxyl radical scavenging activity. Compounds 4k and 4n presented LO inhibitory activity.
Conclusion:
Compound 13e presents an antioxidant significant profile combining anti-LO, anti-AChE and anti-MAO-B activities.
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