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A heterogeneous route for transfer hydrogenation reactions of ketones using Ru(II) Cymene complex over modiifed benzene-organosilica (PMOB)

A heterogeneous route for transfer hydrogenation reactions of ketones using Ru(II) Cymene complex over modiifed benzene-organosilica (PMOB)
A heterogeneous route for transfer hydrogenation reactions of ketones using Ru(II) Cymene complex over modiifed benzene-organosilica (PMOB)
An inorganic-organic hybrid catalyst, Ru(II)Cym@PMOB, was synthesized by anchoring of [Ru(II)Cl2(p-cymene)]2 complex which is derived from a reaction between hydrated ruthenium(III) trichloride and α-phellandrene over aminofunctionalized benzene-organosilica (PMOB). In the context of secondary alcohol synthesis from ketones, transfer hydrogenation (TH) reactions are convenient compared to conventional hydrogenation reactions owing to its lower activation energy and ambient pressure and mild temperature reaction conditions. The synthesized catalysts were characterized by CHN analysis, XRD, ICP, N2-sorption analysis, TG & DTA, FTIR, 13C & 29Si solid NMR, UV–vis, TEM, SEM and XPS. The catalytic activities of neat [Ru(II)Cl2(p-cymene)]2 complex and Ru(II)Cym@PMOB were evaluated in transfer hydrogenation (TH) of ketones (∼97%) and compared with conventional hydrogenation reactions (∼5%) where molecular H2 was used. The results showed Ru(II)Cym@PMOB as highly active catalyst towards transfer hydrogenation (TH) reaction of acetophenones compared to neat [Ru(II)Cl2(p-cymene)]2 complex. The heterogeneity of Ru(II)Cym@PMOB was confirmed by Sheldon’s test.
1381-1169
66-74
Lazar, Anish
f01c546a-a2e1-4b7b-a121-dd6e06de6b61
Sankar, Silpa
5180fa8b-1f86-4134-b629-c8017f81fb82
Vinod, Chathakudath P.
02386bb6-9b4a-4904-99e2-8c7702ebf582
Singh, A.P.
df443df3-4520-4abc-9aff-09160821b030
Lazar, Anish
f01c546a-a2e1-4b7b-a121-dd6e06de6b61
Sankar, Silpa
5180fa8b-1f86-4134-b629-c8017f81fb82
Vinod, Chathakudath P.
02386bb6-9b4a-4904-99e2-8c7702ebf582
Singh, A.P.
df443df3-4520-4abc-9aff-09160821b030

Lazar, Anish, Sankar, Silpa, Vinod, Chathakudath P. and Singh, A.P. (2017) A heterogeneous route for transfer hydrogenation reactions of ketones using Ru(II) Cymene complex over modiifed benzene-organosilica (PMOB). Journal of Molecular Catalysis A: Chemical, 440, 66-74. (doi:10.1016/j.mcat.2017.07.018).

Record type: Article

Abstract

An inorganic-organic hybrid catalyst, Ru(II)Cym@PMOB, was synthesized by anchoring of [Ru(II)Cl2(p-cymene)]2 complex which is derived from a reaction between hydrated ruthenium(III) trichloride and α-phellandrene over aminofunctionalized benzene-organosilica (PMOB). In the context of secondary alcohol synthesis from ketones, transfer hydrogenation (TH) reactions are convenient compared to conventional hydrogenation reactions owing to its lower activation energy and ambient pressure and mild temperature reaction conditions. The synthesized catalysts were characterized by CHN analysis, XRD, ICP, N2-sorption analysis, TG & DTA, FTIR, 13C & 29Si solid NMR, UV–vis, TEM, SEM and XPS. The catalytic activities of neat [Ru(II)Cl2(p-cymene)]2 complex and Ru(II)Cym@PMOB were evaluated in transfer hydrogenation (TH) of ketones (∼97%) and compared with conventional hydrogenation reactions (∼5%) where molecular H2 was used. The results showed Ru(II)Cym@PMOB as highly active catalyst towards transfer hydrogenation (TH) reaction of acetophenones compared to neat [Ru(II)Cl2(p-cymene)]2 complex. The heterogeneity of Ru(II)Cym@PMOB was confirmed by Sheldon’s test.

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More information

Accepted/In Press date: 19 July 2017
e-pub ahead of print date: 4 August 2017
Published date: October 2017

Identifiers

Local EPrints ID: 435018
URI: http://eprints.soton.ac.uk/id/eprint/435018
ISSN: 1381-1169
PURE UUID: 3fd9ae08-0d05-42d0-9370-9e3de00800f4

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Date deposited: 18 Oct 2019 16:30
Last modified: 06 Oct 2020 22:40

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