通过将4-二烷基氨基吡啶部分固定在Fe 3 O 4磁性纳米颗粒(MNP–DMAP)上,开发了一种新型的异质磁性纳米有机催化剂。它是通过MNP-环氧乙烷(MNPO)与N-甲基吡啶-4-胺的反应合成的。通过使用H 2 O 2氧化乙烯基官能化的MNP(VMNP)表面上的乙烯基来生产MNPO基板。为了合成VMNP,使二氧化硅涂覆的磁性纳米颗粒(Fe 3 O 4 @SiO 2)与三甲氧基(乙烯基)硅烷反应。MNP–DMAP催化剂在2-氨基-4 H的合成中显示出显着的活性-Crene-3-carbontritrile衍生物在温和条件下于水中作为绿色溶剂使用多组分反应。MNP–DMAP在此过程中至少可重复使用10次,而无需对其催化活性进行任何处理。
A series of 4-aryl/heteroaryl-4H-fused pyrans was synthesized via multicomponent reaction in a microwave synthesizer. All the pyrans were evaluated for in vitro xanthine oxidase inhibition. Structure-activity relationship was also established. Among the series of 108 compounds, Compound 5n was the most potent displaying remarkable inhibition against the enzyme with an IC50 value of 0.59 mu M. Enzyme kinetic study was carried out for the compound 5n to determine the type of inhibition. The study revealed that the compound 5n was a mixed-type inhibitor. Molecular modelling studies were also performed to figure out the interactions of both the enantiomers of 5n with the amino acid residues of the enzyme.[GRAPHICS].