A Co–Cu bimetallic magnetic nanocatalyst with synergistic and bifunctional performance for the base-free Suzuki, Sonogashira, and C–N cross-coupling reactions in water

Abstract

<p>A novel magnetically recyclable bimetallic catalyst by anchoring imidazolium moiety and PEG chains on the Fe3O4 NPs was prepared and named as Fe3O4@PEG/Cu-Co. It was founded as a powerful catalyst...</p>

Ni/Pd-catalyzed Suzuki–Miyaura cross-coupling of alcohols and aldehydes and C–N cross-coupling of nitro and aminesviadomino redox reactions: base-free, hydride acceptor-free

“…Nasseri et al reported a Co-Cu bimetallic nanocatalyst with a synergistic and bifunctional performance for base-free Suzuki, Sonogashira, and C-N cross-coupling reactions. 11 C-C and C-N cross-coupling reactions are of great importance due to their application in the construction of applicable biologically active molecules, functional materials, and pharmaceuticals. 18,19 Thus, due to their inevitable application in the synthesis of organic and pharmaceutical molecules, the construction of these bonds is very important.…”

“…18,19 Thus, due to their inevitable application in the synthesis of organic and pharmaceutical molecules, the construction of these bonds is very important. 11,19 Conventional C-C cross-coupling reactions such as Suzuki, Heck, and Sonogashira couplings utilize aryl halides as the electrophile, which in most cases is limited to aryl iodide and aryl bromide, and undesirable efficiency is obtained for aryl chlorides. In addition, these compounds are expensive, and their variety is limited due to their low availability.…”

“…All other reagents were of analytical grade. Dimethyl sulfone (DMSO 2 ) crystals were prepared according to a previously reported procedure 11 and used as the solvent in the reactions. Reaction progress was monitored by thin layer chromatography (TLC) on silica gel (Polygram SILG/UV 254 plates) or gas chromatography (GC) using a Shimadzu-14B gas chromatography equipped with an HP-1 capillary column and N 2 as the carrier gas and anisole as an internal standard.…”

“…In the last decade, multifunctional catalytic systems have been widely developed in organic synthesis 11,12 as follows: (1) Pd-DTP@ZIF-8 in one-pot synthesis of 3-phenyl propyl benzoate, 13 (2) HRh(CO)(PPh 3 ) 3 impregnated on Mg 1Àx Al x (OH 2 ) x+ (CO 3…”

Mg‐catalyzed one‐pot preparation of benzimidazoles and spirooxindoles by an immobilized chlorophyll b on magnetic nanoparticles

“…This amount of catalytic activity can be attributed to the presence of silica groups on the catalyst surface. [ 47 ] MgCl 2 also produced 20% efficiency in 2 h (Table 3, Entry 7). The results showed that Fe 3 O 4 @SiO 2 @Chl‐Mg possesses unique catalytic activity resulting from the correlation of different components of each, with potential catalytic activity.…”