“Click” magnetic nanoparticle-supported palladiumcatalyst: a phosphine-free, highly efficient and magnetically recoverable catalyst for Suzuki–Miyaura coupling reactions

Abstract

A novel magnetic nanoparticle-supported nano-palladium catalyst was successfully prepared via a ''click'' route. The as-prepared catalyst was well characterized and evaluated in Suzuki-Miyaura coupling in terms of activity and recyclability in aqueous ethanol. It was found to be highly efficient for the reactions of various aryl bromides with arylboronic acids under phosphine-free and low Pd loading (0.2 mol%) conditions. Moreover, the catalyst could be easily separated from the reaction system by an external magnet and reused several times without a remarkable loss of its activity.

Magnetic nanoparticles supported oxime palladacycle as a highly efficient and separable catalyst for room temperature Suzuki–Miyaura coupling reaction in aqueous media

“…[16][17] Formation of oxime 1 was confirmed using 1 H NMR from the reaction mixture of 1-(4-aminophenyl)ethanone oxime and triethoxy (3-isocyanatopropyl) silane (Scheme 2).…”

“…Magnetite (Fe 3 O 4 ) nanoparticles were prepared following a similar procedure reported in the literature, 17 which will briefly be explained in the following. FeCl 3 .6(H 2 O) (11.0 g) and FeCl 2 .4(H 2 O) (4.0 g) were dissolved in 250 mL deionized water under argon with vigorous stirring using mechanical stirrer.…”

A new magnetic nanoparticle‐supported Schiff base complex of manganese: an efficient and recyclable catalyst for selective oxidation of alcohols

“…[21,22] In continuation of the research on MNP-supported catalysts, herein we report the synthesis of a new MNP-supported manganese catalyst (Mn@MNP) and its application in alcohol oxidation reactions. Mn@MNP was prepared via the copper-catalyzed 'click' reaction of an aminosalicylidene manganese complex bearing terminal alkynyl with azide-functionalized silica-coated Fe 3 O 4 nanoparticles (1).…”

The Use of Palladium on Magnetic Support as Catalyst for Suzuki–Miyaura Cross-Coupling Reactions

“…The work by Zhang et al utilized catalyst 1 for the formation of biaryls ( Table 2, Entry 1) [50]. The catalyst gave constantly high yields for X = Br and I, however, when X = Cl the yields dropped dramatically.…”