Magnetic Nanoparticle Supported Imino-pyridine Palladium Catalyzed Suzuki Reactions

Abstract

A new magnetic nanoparticle supported palladium catalyst was successfully prepared by attaching palladium acetates to imino-pyridine ligand functionalized silica-coated nano-Fe 3 O 4 . The as-prepared catalyst was characterized by element analysis, FTIR, TEM, XPS and ICP-AES. It was found to be an efficient catalyst for Suzuki reactions in aqueous medium. And the reactions of various aryl bromides with arylboronic acids could be carried out under air and low Pd loading conditions with 83%～98% yields. Moreover, the catalyst could be easily recovered by magnetic separation and reused five times without a significant loss of catalytic activity.

Facile One-Pot Synthesis of Amidoalkyl Naphthols and Benzopyrans Using Magnetic Nanoparticle-Supported Acidic Ionic Liquid as a Highly Efficient and Reusable Catalyst

“…Considering the importance of the amidoalkyl naphthols and benzopyrans and as a part of our continuous work on developing supported catalysts for organic transformations [41][42][43][44][45], herein, we utilized this novel and magnetically recoverable catalyst AIL@MNP for one-pot synthesis of amidoalkyl naphthols and benzopyrans from simply available substrates under milder reaction conditions (Scheme 1). In comparison with our previously prepared silica supported acidic IL (AIL@SiO2) [46] or pure IL catalyst [47,48], the AIL@MNP has a variety of advantages such as facile and effective catalyst recovery, high activity, low leaching and so on.…”