Pd/MgO：A Recyclable, Ligand-free Heterogeneous Catalyst for Decarboxylative Cross-Coupling of Arene Carboxylic Acids with Aryl Halides

Abstract

Decarboxylative coupling of arene carboxylic acids with aryl halides is achieved by using a ligand-free Pd/MgO (0.5 mol% Pd) heterogeneous catalyst system. Both electron-rich and electron-deficient arene carboxylic acids can be used as aryl sources to couple a variety of aryl bromides, even aryl chlorides in moderate-to-excellent yields. The establishment of heterogeneous catalysis for the decarboxylative cross-coupling along with the reusability of the heterogeneous catalyst should facilitate the practical application of this transformation in organic synthesis.

MgH2/CuxO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

“…To convert CO 2 from a detrimental gas into value-added chemicals, e.g., CH 3 OH, C 2 H 5 OH, lower olefins, and aromatic hydrocarbons, not only contributes to mitigating CO 2 emissions but also provides a feasible avenue for carbon recycling and energy storage. , Current methods for CO 2 conversion mainly include thermal-, electro-, or photoreduction by heterogeneous or homogeneous catalysis. − As a common method for catalytic conversion, − heterogeneous catalysis is the most in-depth investigated and developed method for CO 2 conversion due to its high handling capacity and easy operation. , However, this thermal conversion of CO 2 to value-added chemicals is a challenging task because it requires high Gibbs energy input (the Gibbs formation energy Δ G 298.15 K 0 = −394.4 kJ mol –1 ) and has to overcome high kinetic energy barriers. , …”