Osmium impregnated on magnetite as a heterogeneous catalyst for the syn-dihydroxylation of alkenes
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چکیده
منابع مشابه
Osmium Impregnated on Magnetite as a Heterogeneous Catalyst for the syn-Dihydroxylation of Alkenes
A new catalyst derived from osmium has been prepared, fully characterized and tested in the dihydroxylation of alkenes. The catalyst was prepared by wet impregnation methodology of OsCl3•3H2O on a commercial micro-magnetite surface. The catalyst allowed the reaction with one of the lowest osmium loadings for a heterogeneous catalyst and was selective for the monodihydroxylation of 1,5-dienes. M...
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We report on the activity of fullerene-supported OsO(4) catalysts in the achiral dihydroxylation of olefins using N-methylmorpholine N-oxide as co-oxidant. The fullerene-supported OsO(4) catalysts can selectively dihydroxylate olefins with conversions up to 95% after 48 h without leaching, and the catalysts can be recovered and recycled several times.
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Osmium tetroxide is by far the most versatile catalyst for cis-dihydroxylation (DH) of double bonds.[1, 2] When homogeneous catalysts are used, free OsO4 is always present in some step of the catalytic cycle, and the high toxicity and volatility of OsO4 have hitherto obstructed industrial application. Previous attempts to immobilize OsO4 used polymers, for example, with coordination of OsO4 on ...
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چکیده ندارد.
Mn(II)-Schiff base complex immobilized onto MCM-41 matrix as a heterogeneous catalyst for epoxidation of alkenes
A heterogeneous catalyst containing manganese Schiff base complex (derived from 2,4-dihydroxybenzadehyde and 1,2-phenylenediamine) is produced by covalent anchoring in MCM-41 matrix. The synthesized catalyst was characterized by X-ray diffraction pattern (XRD), inductivity coupled plasma (ICP), Fourier transform infrared (FT-IR) spectroscopy, N2 sorbtion-desorbtion isotherm and by tr...
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ژورنال
عنوان ژورنال: Applied Catalysis A: General
سال: 2014
ISSN: 0926-860X
DOI: 10.1016/j.apcata.2013.10.050