Heterogenized Ru(II) phenanthroline complex for chemoselective hydrogenation of diketones under biphasic aqueous medium

TitleHeterogenized Ru(II) phenanthroline complex for chemoselective hydrogenation of diketones under biphasic aqueous medium
Publication TypeJournal Article
Year of Publication2010
AuthorsDeshmukh, AA, Kinage, AK, Kumar, R, Meijboom, R
JournalJournal of Molecular Catalysis A-Chemical
Volume333
Issue1-2
Pagination114-120
Date PublishedDEC
ISSN1381-1169
Keywords4-Hydroxypentan-2-one, acetylacetone, Chemoselective, Diketone, Hydrogenation, Phenanthroline, ruthenium, Water
Abstract

The chemoselective hydrogenation of acetylacetone to 4-hydroxypentan-2-one over immobilized ruthenium phenanthroline metal complexes in amino functionalized MCM-41 in biphasic aqueous reaction medium was investigated. The catalyst was characterized by XRD, TEM, surface analysis, FT-IR and UV-vis to understand the morphology, complex geometry, and XPS such that the oxidation state of the metal complex inside the MCM-41 framework could be understood. The use of water as a solvent, not only gives high activity and selectivity for hydrogenation of acetylacetone, but also gives a path for an environmentally safer process. The optimizations of ligand, metal to ligand ratio, the choice of solvent and other reaction parameters were studied in detail. The heterogeneous catalytic system gave a higher degree of chemoselectivity (99%) towards 4-hydroxypentan-2-one as compared to homogeneous catalyst when hydrogenation was carried out using water as a solvent. The immobilized ruthenium-phenanthroline complex was easily separated and reused. (C) 2010 Elsevier B.V. All rights reserved.

DOI10.1016/j.molcata.2010.10.005
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.872

Divison category: 
Catalysis and Inorganic Chemistry