and applicability of green procedures. In this work, lanthanide–EDTA complexes covalently bonded on Fe3O4@SiO2 magnetic nanoparticles (Fe3O4@SiO2-xN-EDTA–Ln3+, with x = 1, 2, or 3 N spacer groups, and Ln3+ = La3+, Ce3+, Sm3+, Eu3+, Gd3+, Tb3+, Er3+ or Yb3+) were prepared and investigated as a heterogeneous catalyst for the synthesis of N-acylhydrazones. The target molecules were obtained in good to excellent
在最近几年中,已经开发出许多使用磁性纳米材料基催化剂的合成方法,这些方法对于绿色工艺的效率,选择性和适用性具有相当大的优势。在这项工作中,
镧系元素-
EDTA络合物共价键合在Fe 3 O 4 @SiO 2磁性纳米颗粒上(Fe 3 O 4 @SiO 2 - x N-
EDTA-Ln 3+,其中x = 1、2或3 N间隔基并且Ln 3+ = La 3+,Ce 3+,Sm 3+,Eu 3+,Gd 3+,Tb 3+,Er制备了3+或Yb 3+)并作为合成N-酰基hydr的非均相催化剂进行了研究。在温和条件下反应时间短,易回收催化剂的浓度低后,仅以E-非对映异构体的形式获得了高至优异收率的目标分子。