“…The other aryl chlorides tested or reacted in the order of trace (entries 9-10) or did not promote the reaction (entry 11). In this study, the TON and TOF values were calculated and proved to be superior (see entry 1) to other catalytic systems that employ similar conditions (conventional heating and the same amount of catalyst) [24][25][26].…”
Section: Resultsmentioning
confidence: 85%
“…The band observed at 2363 cm −1 indicates a possible contamination of the sample by CO 2 during the FT-IR analysis. Thus, based on the FT-IR data, it can be inferred that the phenolic hydroxyl groups present in the extract of yerba mate play an important role in the reduction of Pd(II) cations and [9,11,13,23], together with the carbonyl groups, has a possible action consortium in the stabilization of Pd NPs [24]. ICP-OES analysis was also performed on the prepared PdISM sample, and it showed that only 29% of the weight was formed by Pd.…”
Section: Resultsmentioning
confidence: 98%
“…Thus, with the actual knowledge about the composition of PdISM, the catalytic activity of the solid obtained was tested in the Suzuki-Miyaura reaction of phenylboronic acid with 4-bromotoluene (Scheme1, Table 2). The catalytic systems employed were guided by previous work of our research group and excelled by the use of the eco-friendly reagents [24][25][26].…”
This manuscript relates, for the first time, palladium nanoparticle production by bio-reduction using an Ilex paraguariensis aqueous extract. The solid obtained, PdISM, was used as a catalyst in Suzuki–Miyaura cross-coupling, composing a new eco-friendly, ligand-free, and low cost catalytic system. Excellent yields were obtained in the coupling of aryl iodides and bromides with phenylboronic acid. The same catalyst load was able to be recycled 3x.
Graphical Abstract
“…The other aryl chlorides tested or reacted in the order of trace (entries 9-10) or did not promote the reaction (entry 11). In this study, the TON and TOF values were calculated and proved to be superior (see entry 1) to other catalytic systems that employ similar conditions (conventional heating and the same amount of catalyst) [24][25][26].…”
Section: Resultsmentioning
confidence: 85%
“…The band observed at 2363 cm −1 indicates a possible contamination of the sample by CO 2 during the FT-IR analysis. Thus, based on the FT-IR data, it can be inferred that the phenolic hydroxyl groups present in the extract of yerba mate play an important role in the reduction of Pd(II) cations and [9,11,13,23], together with the carbonyl groups, has a possible action consortium in the stabilization of Pd NPs [24]. ICP-OES analysis was also performed on the prepared PdISM sample, and it showed that only 29% of the weight was formed by Pd.…”
Section: Resultsmentioning
confidence: 98%
“…Thus, with the actual knowledge about the composition of PdISM, the catalytic activity of the solid obtained was tested in the Suzuki-Miyaura reaction of phenylboronic acid with 4-bromotoluene (Scheme1, Table 2). The catalytic systems employed were guided by previous work of our research group and excelled by the use of the eco-friendly reagents [24][25][26].…”
This manuscript relates, for the first time, palladium nanoparticle production by bio-reduction using an Ilex paraguariensis aqueous extract. The solid obtained, PdISM, was used as a catalyst in Suzuki–Miyaura cross-coupling, composing a new eco-friendly, ligand-free, and low cost catalytic system. Excellent yields were obtained in the coupling of aryl iodides and bromides with phenylboronic acid. The same catalyst load was able to be recycled 3x.
Graphical Abstract
In this work we describe the study of some Suzuki coupling reactions of an aryl halide with arylboronic acids. The reaction yields obtained were increased through sonochemical activation and in the presence of a phase transfer catalyst for a very short period of time. The isolated products obtained are highly pure. In this context, we propose the reaction mechanisms for these reactions in the presence of a catalyst. The synthesized compounds were screened for their antioxidant activity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric reducing power (FRP) assay and ferrous ion chelating (FIC) methods. It was found that the synthesized biaryl compounds show an enhancing antioxidant activity.
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