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Jessop

Jessop and co-workers studied asymmetric hydrogenation reactions with the catalyst complex Ru(OAc)2(tolBINAP) dissolved in [BMIM][PFg]. In both reactions under investigation - the hydrogenation of tiglic acid (Scheme 5.2.10) and the hydrogenation of the precursor of the anti-inflammatory dmg ibuprofen (Scheme 5.2.11) - no CO2 was present during the catalytic transformation. However, SCCO2 was used in both cases to extract the reaction products from the reaction mixture when the reaction was complete. [Pg.231]

The first application involving a catalytic reaction in an ionic liquid and a subsequent extraction step with SCCO2 was reported by Jessop et al. in 2001 [9]. These authors described two different asymmetric hydrogenation reactions using [Ru(OAc)2(tolBINAP)] as catalyst dissolved in the ionic liquid [BMIM][PFg]. In the asymmetric hydrogenation of tiglic acid (Scheme 5.4-1), the reaction was carried out in a [BMIM][PF6]/water biphasic mixture with excellent yield and selectivity. When the reaction was complete, the product was isolated by SCCO2 extraction without contamination either by catalyst or by ionic liquid. [Pg.282]

J E Truman, AMet Consultant metallurgist Jessop Saville Ltd, Sheffield... [Pg.1413]

RG. Jessop and W. Leitner, Chemical Synthesis Using Supercritical Fluids , Wiley-VCH, Weinheim, 1999. [Pg.165]

Finally, Jessop and coworkers describe an organometalhc approach to prepare in situ rhodium nanoparticles [78]. The stabilizing agent is the surfactant tetrabutylammonium hydrogen sulfate. The hydrogenation of anisole, phenol, p-xylene and ethylbenzoate is performed under biphasic aqueous/supercritical ethane medium at 36 °C and 10 bar H2. The catalytic system is poorly characterized. The authors report the influence of the solubility of the substrates on the catalytic activity, p-xylene was selectively converted to czs-l,4-dimethylcyclohexane (53% versus 26% trans) and 100 TTO are obtained in 62 h for the complete hydrogenation of phenol, which is very soluble in water. [Pg.274]

Moffatt, F., Cooper, P.A., and Jessop, K.M., Capillary electrochromatography. Abnormally high efficiencies for neutral-anionic compounds under reversed-phase conditions, Anal. Chem. 71, 1119, 1999. [Pg.439]

Jessop, A., ed. Visitations of the diocese of Norwich. Camden Society, 1888. [Pg.245]

Jessop Ch M, Parsons AF, Routledge A, Irvine DJ (2003) Tetrahedron Asymmetry 14 2849-2851... [Pg.145]


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See also in sourсe #XX -- [ Pg.180 ]




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