Preparation of a magnetic and recyclable superparamagnetic silica support with a boronic acid group for immobilizing Pd catalysts and its applications in Suzuki reactions

Abstract

A novel, high activity and magnetic nanoparticles (Fe3O4@SiO2-APBA-Pd) catalyst was prepared. It is 8–15 nm with 0.2–0.6 nm Pd particles. It can be reused 7 runs and catalyze 14 kinds of Suzuki reactions.

Rhodium-Catalyzed Decarbonylative Suzuki-Miyaura Cross-Coupling via in-Situ Generation of Acyl Fluorides from Carboxylic Acids

“…The proportion of ligand was also surveyed and the molar ratio 1∶2 (catalyst∶ligand) gives out the best result (Entries 15,16). According to the literature, BTFFH and K 3 PO 4 were powerful fluorinating reagent and base in decarbonylation of acyl fluorides, which exhibited inferior efficiency in this reaction ( Entries 17,18). After extensively and systematically screening of the reaction parameter, the optimized condition for decarbonylative Suzuki-Miyaura biaryl synthesis was finally determined.…”

“…m.p. 43.9～44.3 ℃; 1 4-Propyl-1,1'-biphenyl (3c): [18] Colorless oil, 22.5 mg, 52% yield. 1 7, 141.1, 138.5, 128.8, 128.6, 126.9, 126.9, 126.9, 37.7, 24.5, 13.9.…”

Excellent Pd-Loaded Magnetic Nanocatalyst on Multicarboxyl and Boronic Acid Biligands

“…Fe 3 O 4 @SiO 2 −FPBA−DTPA−Pd still maintained high catalytic performance during the repetitive process. However, in the seventh reuse, the yields of Fe 3 O 4 @SiO 2 −DTPA−Pd and Fe 3 O 4 @SiO 2 −APBA−Pd catalysts were 92 and 91%, 31 respectively. Similar to the Heck coupling reaction, after seven runs under the catalysis of Fe 3 O 4 @SiO 2 −FPBA−DTPA−Pd, the yield of methyl cinnamate was still 97%.…”

“…To promote the development of the immobilized Pd, some efforts were made in our laboratory. For example, a highly efficient heterogeneous catalyst (Fe 3 O 4 @SiO 2 –APBA–Pd) was successfully synthesized . It was prepared by using magnetic Fe 3 O 4 -coated silicon as the support, 3-aminophenylboric acid (APBA) as the modifier, and palladium acetate as the catalyst precursor.…”

Pd/Co3O4–Pd/PdO formed in situ on the surface of the self-assembly ferrocenylimine Pd(ii)/Co(ii) monolayer for catalyzing the Suzuki cross-coupling reaction—formation, synergistic effect, and catalytic mechanism

“…The catalytic properties of GO@APTES-Fcl-Pd 0.1 Co 0.9 were also compared with those from the previous literature (Table S6, ESI †), [89][90][91][92][93] and some catalysts require relatively short catalytic time, but the required reaction conditions were relatively high or their TOF values were relatively low. However, the catalyst in this work showed higher activity (TOF = 11 353 h À1 ) and small metal loading.…”