Two resorcinarene-derived tetrathiols with terminal alkene sidechains (tetraarylthiol cavitand 3 and tetrabenzylthiol cavitand 4) were determined to be efficient at extracting colloidal gold nanoparticles from aqueous solutions and stabilizing their dispersion in organic solvents. Treatment of these nanoparticle dispersions with the Grubbs olefin metathesis catalyst resulted in crosslinked reso...

For the enantioselective diversification of a single starting material, different chiral catalyst is usually required for each transformation. Herein, we extend concept catalytically formed auxiliary from hydrogenation to asymmetric cyclopropanation and epoxidation tetra-substituted olefins, alleviating need catalysts in alkene functionalization step. The constructed propargylic amines Pd-catal...

The new heterogeneous catalyst based on MoO2(acac)2 immobilized on superparamagnetic nanoparticle functionalized with dendrimer was synthesized. The dendrimer with amine and sulfur functional groups offer proper positions for a strong connection between MoO2(acac)2 and support. The synthesized catalyst was characterized by FT-IR spectroscopy, ICP, TGA, SEM, TEM, and XRD. This catalyst showed hi...

Ti-silicates activate H2O2 to form Ti-hydroperoxo and Ti-peroxo intermediates that can react with alkenes epoxide products. Comparisons of kinetics for 1-octene epoxidation on Ti-BEA Ti-MFI catalysts different hydrophilicities in methanol (CH3OH) or acetonitrile (CH3CN) solvents show the significance solvent stabilizing catalytically-relevant species complex interdependencies between solvent, c...

Mesoporous zirconium-silicates have been prepared using two different methodologies, evaporation-induced self-assembly and solventless organometallic precursor dry impregnation of commercial SiO2. The samples were characterized by elemental analysis, XRD, N2 adsorption, TEM, DRS UV–vis Raman spectroscopic techniques. catalytic performance the Zr-Si catalysts was assessed in epoxidation three re...

The generation of multifunctional isolated active sites in zeolite supports is an attractive method for integrating multistep sequential reactions into a single-pass tandem catalytic reaction. In this study, bifunctional TiSn-Beta was prepared by simple and scalable post-synthesis approach, it utilized as efficient heterogeneous catalyst the conversion alkenes to 1,2-diols. Ti Sn Lewis acid wit...