438633-51-3Relevant academic research and scientific papers
A new palladium heterogeneous complex (Pd-Gu@BOEH): chemoselective, phosphine-free and practical nanocatalyst in carbon–carbon cross-coupling reaction
Jafari, Fariba,Ghorbani-Choghamarani, Arash,Hasanzadeh, Neda
, p. 1033 - 1049 (2021)
Herein, boehmite nanoparticles were synthesized via combination of Al(NO3)3·9H2O and NaOH in aqueous solution. This nanomaterial converted to Pd-Gu@BOEH in several sequences. Pd-Gu@BOEH was used as efficient and recoverable nanocatalyst for the chemoselective C–C band formation such as Mizoroki–Heck and Suzuki–Miyaura reactions without any phosphine ligands or inert atmosphere. This catalyst has been characterized by several analyses such as EDS, WDX, SEM, XRD, FT-IR, TEM, TGA, AAS and BET. Also, obtained products from C–C coupling reactions were identified by NMR spectroscopy and their melting points. This catalyst was recycled in described reactions without palladium leaching. The reused catalyst was characterized by EDS, WDX, XRD, FT-IR and AAS analysis, which showed good stability during reaction process.
Synthesis and characterization of mesoporous organosilica supported palladium (SBA-Pr-NCQ-Pd) as an efficient nanocatalyst in the Mizoroki–Heck coupling reaction
Moradi, Razieh,Mohammadi Ziarani, Ghodsi,Badiei, Alireza,Mohajer, Fatemeh
, (2020/10/02)
In the present study, the modification of a mesoporous organosilica nanocomposite SBA-15 (Santa Barbara Amorphous 15) was carried out in two steps, first through the surface functionalization of SBA-Pr-NH2 with 2-chloroquinoline-3-carbaldehyde to form SBA-Pr-NCQ, and then through a post-modification process with palladium ions. The target nanocompound structure of SBA-Pr-NCQ-Pd was characterized by different techniques (thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, Energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy). The catalytic performance of the porous inorganic–organic hybrid nanocomposite (SBA-Pr-NCQ-Pd) in one of the most important carbon–carbon bond-forming processes, the Mizoroki–Heck coupling reaction of aryl halides and methacrylate in water/ethanol media, was examined. Compared to previous reports, this protocol afforded some advantages, such as high yields of products, short reaction times, catalyst stability without leaching, simple methodology, easy workup, and greener conditions. Also, the nanocatalyst can be easily separated from the reaction mixture and reused several times without a significant decrease in activity and promises economic as well as environmental benefits.
Synthesis of phthalides utilizing a one-pot intramolecular domino protocol
Yasmin, Nasima,Ray, Jayanta K.
, p. 25631 - 25635 (2013/12/04)
A number of (E)-3-alkylidine-phthalide derivatives have been prepared at room temperature in excellent yields in a one-pot reaction by treating o-alkenylbenzoic acids with meta-chloroperbenzoic acid and para-toluenesulfonic acid. This reaction presumably occurs via domino epoxidation-intramolecular cyclization-acid catalyzed dehydration sequence of reactions. On the other hand, 3-(2-formyl-3,4-dihydro-naphthalen-1-yl)-acrylic acid esters and 3-(2-formyl-3,4-dihydro-naphthalen-1-yl)-acrylonitriles afforded phthalide derivatives under Pinnick reaction conditions involving oxidation-intramolecular Michael addition.
