Pd-loaded superparamagnetic mesoporous NiFe2O4 as a highly active and magnetically separable catalyst for Suzuki and Heck reactions

Efficient C--C cross-coupling reactions by (isatin)-Schiff base functionalized magnetic nanoparticle-supported Cu(II) acetate as a magnetically recoverable catalyst

“…49 At the end of the reaction, the mixture was cooled to room temperature and the solid catalyst was isolated by magnetic decantation. The recyclability of the catalyst was screened in the reaction between iodoanisole and phenylboronic acid according to the same method described above.…”

Palladium(II) on Functionalized NiFe2O4: An Efficient and Recyclable Phosphine-Free Heterogeneous Catalyst for Suzuki Coupling Reaction

“…Various coupling reactions using magnetically separable Pd-based catalysts have been well documented [20][21][22][23][24][25][26]. In our continuing effort to develop new palladium based heterogeneous catalyst [27][28][29], here we wish to report the Suzuki cross coupling reaction using palladium catalyst immobilized on super-paramagnetic nanoparticles without added phosphine ligands.…”

Nanocatalysts for the Heck Coupling Reactions

“…Gao et al developed a synthetic method to high-surface-area superparamagnetic mesoporous NiFe 2 O 4 for use as magnetically separable support material for catalytic groups. 128,129 The material was synthesized by controlled thermal decomposition of Ni and Fe oxalate precursors with a template-free synthetic approach. Pd-NPs were then synthesized within the pores of the resulting porous material with a two-step procedure, consisting of wet impregnation of aqueous ammonium tetrachloropalladate(II) (or (NH 4 ) 2 PdCl 4 ) into the pores of the material at room temperature, followed by reduction of the resulting material in 5% H 2 /Ar at 200 • C to yield Pd(0) nanoparticles.…”

“…Pd-NPs were then synthesized within the pores of the resulting porous material with a two-step procedure, consisting of wet impregnation of aqueous ammonium tetrachloropalladate(II) (or (NH 4 ) 2 PdCl 4 ) into the pores of the material at room temperature, followed by reduction of the resulting material in 5% H 2 /Ar at 200 • C to yield Pd(0) nanoparticles. 129 This procedure produced a high-surface-area magnetic mesoporous NiFe 2 O 4 catalyst with uniformly dispersed Pd(0) nanoparticles that showed high catalytic activities in C C bond-forming Heck and Suzuki coupling reactions. After the catalytic reactions, the solid catalyst was easily separated for reuse using a magnetic field.…”

“…Mesoporous silica-stabilized Pd(0) nanoparticles, which served as cooperative catalysts for C C and Heck coupling reactions due to the involvement of the support material in the catalytic process 129. (Adapted with permission from Ref.…”