An improved Suzuki–Miyaura cross-coupling reaction with the aid of in situ generated PdNPs: evidence for enhancing effect with biphasic system

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

“…Figure S2 in the SI shows the XRD patterns of the products prepared by varying the different reaction parameters (Table ). The diffractograms show the presence of diffraction peaks at 2θ = 38, 46, and 66° which are characteristic peaks of Pd as reported earlier . The additional peaks appeared in the diffractogram might be due to some complex formed between Pd (II) and the organic moiety present in the extract as reported earlier …”

“…The diffractograms show the presence of diffraction peaks at 2θ = 38, 46, and 66°which are characteristic peaks of Pd as reported earlier. [50] The additional peaks appeared in the diffractogram might be due to some complex formed between Pd (II) and the organic moiety present in the extract as reported earlier. [33] Further, to confirm the capping of Pd NPs by biomolecules, we recorded the FTIR spectra of plant extract reduced Pd NPs and the plant extract which are presented in Figure 5.…”

“…These asymmetric biaryl compounds find wide applications in the production of agrochemicals, natural products, pharmaceuticals and functional materials . Many studies have reported on the improvements in the activity and selectivity of these catalysts where Pd NPs are formed during the reaction that acts as the active catalyst . However, ligands used in the system and the corresponding catalysts have several disadvantages such as the use of expensive, toxic phosphine ligands and organic solvents, harsh reaction condition, low yield, environmental problems caused by the side product formation, inert atmosphere conditions.…”

“…[47,48] Many studies have reported on the improvements in the activity and selectivity of these catalysts where Pd NPs are formed during the reaction that acts as the active catalyst. [46,49,50] However, ligands used in the system and the corresponding catalysts have several disadvantages such as the use of expensive, toxic phosphine ligands and organic solvents, harsh reaction condition, low yield, environmental problems caused by the side product formation, inert atmosphere conditions. Also, the phosphine ligands are readily oxidized to their corresponding phosphine oxides, which can prevent the easy recovery and recycling of the catalyst.…”

Water hyacinth ash: an efficient green catalyst for the synthesis of β-amino carbonyl/nitrile compounds by aza-Michael reaction at room temperature

“…Recently, the water extracts of various agro-waste ashes have been successfully employed as green and nonconventional solvent or as green catalysts in a number of organic reactions viz. Suzuki-Miyaura [1][2][3][4][5][6][7] and Sonogashira cross-coupling [8,9], Dakin reaction [10], ipso-hydroxylation of arylboronic acid [11], Knoevenagel reaction [12], Henry reaction [13], 3-carboxycoumarins synthesis [14], peptide bond synthesis [15], etc. Additionally, many researchers have reported the ash based heterogeneous catalysts derived from different agricultural wastes as the promising green catalysts for biodiesel production.…”