Hydrotalcite-supported palladium nanoparticles as catalysts for the hydroarylation of carbon–carbon multiple bonds
作者:A. Di Nicola、A. Arcadi、K. Gallucci、V. Mucciante、L. Rossi
DOI:10.1039/c7nj04046f
日期:——
alkenes with aryl iodides under air in MeCN. The reaction of tertiary propargylic alcohols (1) with aryl iodides (2) yields, stereoselectively, γ,γ-diarylallylic alcohols (3) in moderate to high yields and high selectivity. Also, the HT/Pd hydroarylation reaction with aryl iodides was attempted on norbornene and α,β-unsaturated ketones affording, respectively, exo-aryl bicyclo[2.2.1]heptanes and β-aryl ketones
Highly selective hydrogenation and hydrogenolysis using a copper-doped porous metal oxide catalyst
作者:Laurene Petitjean、Raphael Gagne、Evan S. Beach、Dequan Xiao、Paul T. Anastas
DOI:10.1039/c5gc01464f
日期:——
A copper-doped porous metal oxide catalyst in combination with hydrogen shows selective and quantitative hydrogenolysis of benzyl ketones and aldehydes, and hydrogenation of alkenes.
一种掺铜多孔金属氧化物催化剂与氢气结合,可实现对苄基酮和醛的选择性和定量氢解,以及烯烃的加氢作用。
Activity and selectivity of different base catalysts in synthesis of guaifenesin from guaiacol and glycidol of biomass origin
作者:Shivaji L. Bhanawase、Ganapati D. Yadav
DOI:10.1016/j.cattod.2016.12.008
日期:2017.8
2-diol). Different catalysts such as hydrotalcite (HT), calcined hydrotalcite (CHT), calcinated hydrotalcitesupported on hexagonal mesoporous silica, magnesium oxide, alumina and, potassium promoted zirconium oxide were synthesized, out of which CHT was found to be the most active, selective and reusablecatalyst. The catalyst characterization was done by different techniques. Both Oxide and hydroxide
have demonstrated a highly active and selective nanocatalyst, Rh/HAP (rhodium supported on hydroxyapatite), for the reduction of nitroarenes with hydrazine and for the hydrogenation of olefins with hydrogen gas under mild conditions. Nitroarenes were hydrogenated selectively to the corresponding anilines over the Rh/HAP catalyst with hydrazine as reducing agent, and reducible groups, such as halides
Tin-containing hydrotalcite-like compounds as catalysts for the Meerwein–Ponndorf–Verley reaction
作者:César Jiménez-Sanchidrián、José Rafael Ruiz
DOI:10.1016/j.apcata.2013.09.049
日期:2014.1
catalysts were used in the Meerwein–Ponndorf–Verley (MPV) reaction of benzaldehyde and cyclohexanone in the presence of 2-propanol as hydrogen donor. The mixed oxide obtained by calcining the tin-containing HT was found to be more catalytically active than that obtained from the Mg/Al HT and the pure magnesium oxide. This result can be ascribed to the mechanism of the reaction, which involves acid–base
制备了包含Mg / Al或Mg / Al / Sn的类水滑石化合物(HTs),并用作前体,通过在450°C下煅烧获得碱性催化剂。在2-丙醇作为氢供体的情况下,该催化剂用于苯甲醛和环己酮的Meerwein-Ponndorf-Verley(MPV)反应中。发现通过煅烧含锡HT获得的混合氧化物比从Mg / Al HT和纯氧化镁获得的混合氧化物更具催化活性。该结果可归因于反应机理,该机理涉及催化剂表面的酸碱位。活性最高的催化剂用于其他羰基化合物(包括醛和酮)的MPV反应中,具有出色的转化率和选择性。