Magnetic CoFe2O4 nanoparticle immobilized N-propyl diethylenetriamine sulfamic acid as an efficient and recyclable catalyst for the synthesis of amides via the Ritter reaction
A magneticCoFe2O4nanoparticle immobilized diamine-N-sulfamic acid (CoFe2O4@SiO2–DASA) was synthesized and used as efficient heterogeneous catalyst for the synthesis of amides via the Ritter reaction under solvent-free conditions. The magnetic nanocatalyst could be readily recovered by applying an external magnet and recycled several times without considerable loss of its catalytic activity.
合成了磁性CoFe 2 O 4纳米颗粒固定化的二胺-N-氨基磺酸(CoFe 2 O 4 @SiO 2 -DASA),并用作无溶剂条件下通过Ritter反应合成酰胺的有效多相催化剂。通过施加外部磁体可以容易地回收磁性纳米催化剂,并循环几次,而不会显着降低其催化活性。