设计,合成和表征了十二个角恶唑稠合香豆素衍生物,并通过1 H NMR,13 C NMR和HRMS进行了表征。化合物4a的结构通过X射线单晶衍射进一步确认。生物测定实验结果表明,化合物4f和4l对4种植物病害真菌的菌丝生长具有较高的抗真菌活性。特别是,与市售杀菌剂多菌灵相比,化合物4l具有更强的抗真菌活性。除草活性试验结果表明,图4a和4b中可以显著抑制的直根和主茎发展莱 并比市售除草剂乙草胺具有更好的活性。
Synthesis of Fused Oxazolocoumarins from <i>o</i>
-Hydroxynitrocoumarins and Benzyl Alcohol Under Gold Nanoparticles or FeCl<sub>3</sub>
Catalysis
作者:Evangelia-Eirini N. Vlachou、Gerasimos S. Armatas、Konstantinos E. Litinas
DOI:10.1002/jhet.2842
日期:2017.7
Synthesis of fused oxazolocoumarins has been achieved from the one‐pot tandem reactions of o‐hydroxynitrocoumarins with benzyl alcohol in toluene undercatalysis in a sealed tube at 150°C. The catalysis was performed by gold nanoparticles supported on TiO2 (0.4 mol% Au) or FeCl3 (5%) or silver nanoparticles supported on TiO2 (1.7 mol% Ag).