59344-63-7Relevant academic research and scientific papers
Biopolymer-metal complex wool-Pd as a highly active heterogeneous catalyst for Heck reaction in aqueous media
Wu, Shang,Ma, Hengchang,Jia, Xiaojie,Zhong, Yunmei,Lei, Ziqiang
, p. 250 - 256 (2011)
Heterogeneous palladium catalysts, a biopolymer complex wool-Pd, have been applied in water-mediated coupling reactions of aryl bromides without assistance of any phosphine ligands. The catalyst was characterized by XPS, ICP. The results showed that aryl bromides could carry out the coupling reaction with a variety of alkenes at 80 °C, in aqueous media under atmospheric condition. More importantly, the cheap catalyst is stable, which shows negligible metal leaching, and retain good activity for at least ten successive runs without any additional activation treatment. This approach would be very useful from a practical viewpoint.
A simple, phosphine free, reusable Pd(ii)-2,2′-dihydroxybenzophenone-SBA-15 catalyst for arylation and hydrogenation reactions of alkenes
Lazar, Anish,Vinod, Chathakudath P.,Singh, Anand Pal
, p. 2423 - 2432 (2016/03/19)
An efficient, simple, phosphine and co-catalyst free C-C coupling reaction heterogeneous catalyst via a post grafting method is developed and reported. A covalently anchored phosphine free Pd(ii) based 2,2′-dihydroxybenzophenone (DHBP) complex over organofunctionalized SBA-15 has been synthesized by the reaction between aminofunctionalized SBA-15 (NH2SBA-15) and a 2,2′-dihydroxybenzophenone (DHBP) ligand, and further complexation with Pd(ii)Cl2 to get Pd(ii)-DHBP@SBA-15. The synthesized catalysts were characterized by elemental analysis, XRD, N2 sorption analyses, TG, DTA, FT-IR, solid state 13C and 29Si NMR spectra, XPS, UV-Visible, SEM, EDAX and TEM. The synthesized catalysts were screened in arylation (Heck reactions) and hydrogenation reactions of alkenes, and the results show that Pd(ii)-DHBP@SBA-15 exhibits high conversion and selectivity towards arylation and hydrogenation reactions of alkenes with high stability. The anchored solid catalysts can be recycled effectively and reused several times without major loss in activity.
