Palladium schiff base complex immobilized on magnetic nanoparticles: An efficient and recyclable catalyst for Mizoroki and Matsuda-Heck coupling

Visible Light Mediated Heck Coupling of Inactivated Aryl Fluoride/Chloride Over a Sulfonic Acid Functionalized, Melamine‐based Metal‐free Porphyrin Photocatalyst

“…The effect of varying light intensity on the yield of the reaction has been investigated (Figure 8). We observed a slight hike in yield from 88 % for 9 W to 89 % for 12 W white LED light for a constant duration of 24 h (Table 1, entries 17,18). The minor change in the yield observed for 12 W evidenced that a 5 W light source is sufficient for the generation of excitons during photocatalytic CÀ C coupling.…”

“…Incorporating a magnetic base in designing photocatalyst was found quite effective in quick separation and re‐usability and with this strategy, magnetic Fe 3 O 4 ‐Polyamidoamine supported cobalt nanoparticle (magnetic‐Fe 3 O 4 NP/PAMAM‐Co NP) [15] and two catalysts viz the magnetic melamine‐cyanuric chloride functionalized cobalt nanoparticle supported chitosan (Melamine‐cyanuric/Co‐MNPs/CS) catalyst and cyanuric chloride‐bromohydroxybenzaldehyde functionalized cobalt nanoparticle supported chitosan (cyanuric‐ bromohydroxybenzaldehyde/Co‐MNPs/CS) catalysts have been illustrated as successful protocols for the coupling of aryl halides with alkene affording good to excellent yields [16] . The magnetically separable catalysts containing Pd‐nanoparticles were quite effective for C−C coupling, tolerating a variety of olefins, giving a negligible loss of costly Pd which otherwise got leached in the product [17–26] …”

Overview on magnetically recyclable ferrite nanoparticles: synthesis and their applications in coupling and multicomponent reactions

“…Only 0.3 mol% of the catalyst was required to complete the reaction and was reused for 6 cycles without loss of its activity. 132 Wang et al have reported the synthesis of palladium catalyst based upon magnetic nanoparticles by using bottom up approach to explore its applicability in Heck coupling of acrylic acid derivatives with aryl halides. The Fe 3 O 4 nanoparticles were prepared by chemical co-precipitation method which were further reacted with sodium silicate and TEOS to give Fe 3 -O 4 @SiO 2 .…”

“…Only 0.3 mol% of the catalyst was required to complete the reaction and was reused for 6 cycles without loss of its activity. 132 …”

Crystallization of Nano-Sized Macromolecules by the Example of Hexakis-[4-{(N-Allylimino)methyl}phenoxy]cyclotriphosphazene

“…Schiff bases can coordinate transition metals; therefore, they are used to manufacture palladium catalysts for the Suzuki-Miyaura cross-coupling [16] and Mizoroki-Heck reaction [17] and heteronuclear complexes with lanthanides [18], octahedral nickel(II) complexes [19], copper(II) [20][21][22][23], scandium(III) [24], and cobalt(II) [25] complexes, as well as redox-active complexes with germanium(IV) [26]. Palladium(II) and chromium(III) complexes formed by azomethines containing heterocycles inhibit the growth of S. marcescent, E. coli, and M. luteus bacteria and possess a pronounced antitumor activity against MCF-7, HepG-2, and HCT-116 cancer cells [27].…”