Preparation and Catalytic Application of Pd Loaded Titanate Nanotube: Highly Selective α Alkylation of Ketones with Alcohols

Abstract

The titanate nanotube (TNT) was hydrothermally synthesized in 10 M NaOH aqueous solution at 150 o C for 72 h. Titanate nanotube with high surface area (292 m 2 /g) is a good candidate as a support for catalytic reaction or organic synthesis. Palladium nanoparticles with an average size of ca. 3 nm were well dispersed onto the surface of TNT nanotubes. Palladium loaded catalyst with high surface area shows a highly efficient α alkylation of ketones with primary alcohols.

Solvent-free direct α-alkylation of ketones by alcohols catalyzed by nickel supported on silica–alumina

“…Recyclable heterogeneous catalysts offer a greener approach for the αalkylation of ketones with alcohols. Heterogeneous palladium has been widely used for this transformation in the form of Pd/C, [25][26] Pd/AlO(OH), 27 nanopalladium liganded to viologen polymers, 28 palladium loaded titanate nanotubes, 29 bimetallic Au-Pd nanoparticles 30 and Pd/MgO-Al2O3. 31 Supported ruthenium 32 and copper on hydrotalcite 33 have also been reported as catalysts for this process.…”