Fe 3 O 4 @SiO 2 @丙基三乙氧基硅烷@邻苯二胺作为一种环境友好的功能化二氧化硅涂层磁性有机金属纳米材料,已经通过傅立叶变换红外光谱(FT-IR),扫描电子显微镜(SEM)图像和能量进行了表征色散X射线(EDX)和振动样品磁力计(VSM)分析。然后研究了其催化活性,用于二甲酮,丙二腈和各种取代的芳族醛之间的一锅三组分缩合反应,得到相应的2-氨基-4 H色烯衍生物在温和的反应条件下。可以通过使用磁体容易地从反应混合物中回收该纳米催化剂,并重复使用至少五次而不会显着降低催化活性。
functionalized basicionicliquid, 4-amino-1-(2,3-dihydroxy propyl) pyridinium hydroxide [ADPPY] [OH], has been introduced as a catalyst for the synthesis of tetrahydrobenzo[b]pyrans under mild conditions. The desired products can be separated directly from the reaction mixture with high purity. Only 10 mol% catalyst was needed with a sequestration time of 10 min. In addition, the ionicliquid used can be