An efficient heterogeneous catalytic system for chemoselective hydrogenation of unsaturated ketones in aqueous medium

Autor:	Rajiv Kumar, Reinout Meijboom, A.K. Kinage, Amit Deshmukh
Rok vydání:	2010
Předmět:	Aqueous medium Chemistry Noyori asymmetric hydrogenation chemistry.chemical_element Catalysis Ruthenium Inorganic Chemistry Solvent Materials Chemistry Organic chemistry Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Chemoselectivity Selectivity
Zdroj:	Polyhedron. 29:3262-3268
ISSN:	0277-5387
DOI:	10.1016/j.poly.2010.09.006
Popis:	A highly chemoselective and green heterogeneous catalytic system of immobilized Ru(II)–phenanthroline complexes on amino functionalised MCM-41 material for the chemoselective hydrogenation of unsaturated ketones to unsaturated alcohols is demonstrated using water as a solvent. The XRD and FTIR spectra show the highly ordered hexagonal nature of the MCM-41, even after encapsulation of the ruthenium complex. The complex retains its configuration after anchoring, as was confirmed by FTIR and UV–Vis analysis. The detailed reaction parametric effect was studied for the hydrogenation of 3-methylpent-3-en-2-one to achieve complete conversion up to >99% chemoselectivity of 3-methylpent-3-en-2-ol. The anchored heterogeneous catalysts were recycled effectively and reused five times with marginal changes in activity and selectivity. The use of water as a solvent not only afforded high activity for the hydrogenation reaction compared to organic solvents, but also afforded a green process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::23bd795ba0cec0728ee2fdf752d1a40f https://doi.org/10.1016/j.poly.2010.09.006 Zobrazit plný text záznamu Full Text from ScienceDirect