Achiral Dihydroxylation of Olefins by Osmate (OsO42−) Stabilised on Nanocrystalline Magnesium Oxide

A recoverable and reusable new heterogeneous AP‐Mg‐OsO4 catalyst was designed and developed for the first time via a counterionic stabilisation of OsO42− with Mg2+ present on the corner or edge of nanocrystalline MgO. AP‐Mg‐OsO4 catalysed the dihydroxylation of olefins to afford diols with excellent...

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Veröffentlicht in:	Advanced synthesis & catalysis 2004-01, Vol.346 (1), p.45-48
Hauptverfasser:	Choudary, Boyapati M., Jyothi, Karangula, Kantam, Mannepalli L., Sreedhar, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	counterionic stabilisation dihydroxylation diols nanocrystalline magnesium oxide olefins osmium tetroxide
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container_title	Advanced synthesis & catalysis
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creator	Choudary, Boyapati M. Jyothi, Karangula Kantam, Mannepalli L. Sreedhar, B.
description	A recoverable and reusable new heterogeneous AP‐Mg‐OsO4 catalyst was designed and developed for the first time via a counterionic stabilisation of OsO42− with Mg2+ present on the corner or edge of nanocrystalline MgO. AP‐Mg‐OsO4 catalysed the dihydroxylation of olefins to afford diols with excellent yields in the presence of N‐methylmorpholine N‐oxide for the first time. The absence of osmium and no progress of the dihydroxylation reaction with the filtrate samples withdrawn periodically during the reaction rule out the leaching of osmium unambiguously and provide evidence for the heterogeneity of the reaction. Identification of surface intermediate species by XPS and TGA‐DTA‐mass thermography gives an insight into the mechanism of the dihydroxylation reaction.
doi_str_mv	10.1002/adsc.200303133
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AP‐Mg‐OsO4 catalysed the dihydroxylation of olefins to afford diols with excellent yields in the presence of N‐methylmorpholine N‐oxide for the first time. The absence of osmium and no progress of the dihydroxylation reaction with the filtrate samples withdrawn periodically during the reaction rule out the leaching of osmium unambiguously and provide evidence for the heterogeneity of the reaction. 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Synth. Catal</addtitle><description>A recoverable and reusable new heterogeneous AP‐Mg‐OsO4 catalyst was designed and developed for the first time via a counterionic stabilisation of OsO42− with Mg2+ present on the corner or edge of nanocrystalline MgO. AP‐Mg‐OsO4 catalysed the dihydroxylation of olefins to afford diols with excellent yields in the presence of N‐methylmorpholine N‐oxide for the first time. The absence of osmium and no progress of the dihydroxylation reaction with the filtrate samples withdrawn periodically during the reaction rule out the leaching of osmium unambiguously and provide evidence for the heterogeneity of the reaction. 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subjects	counterionic stabilisation dihydroxylation diols nanocrystalline magnesium oxide olefins osmium tetroxide
title	Achiral Dihydroxylation of Olefins by Osmate (OsO42−) Stabilised on Nanocrystalline Magnesium Oxide
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