کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1335809 | 1500286 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Oxidovanadium(V) complexes with chiral tridentate Schiff bases derived from R(−)-phenylglycinol: Synthesis, spectroscopic characterization and catalytic activity in the oxidation of sulfides and styrene Oxidovanadium(V) complexes with chiral tridentate Schiff bases derived from R(−)-phenylglycinol: Synthesis, spectroscopic characterization and catalytic activity in the oxidation of sulfides and styrene](/preview/png/1335809.png)
A series of vanadium(V) complexes with chiral tridentate Schiff base ligands, obtained by the single condensation of R(−)-phenylglycinol with salicylaldehyde and its derivatives, were prepared. The complexes were characterized by elemental analysis and by their ESI-MS, IR, CD, UV–Vis, 1D (1H, 51V) and 2D (COSY, gHSQC) NMR spectra. The vanadium(V) complexes have the ability to catalyze the oxidation of sulfides [PhSR (R = Me, Bz)] in excellent yields and enantiomeric excesses (over 90%), utilizing aqueous 30% H2O2 or cumene hydroperoxide (CHP) as the oxidant. These complexes are also catalytically active in the oxidation of styrene, using aqueous 30% H2O2 or tert-butyl hydroperoxide (TBHP) as the oxidant, to styrene oxide, benzaldehyde, benzoic acid, phenylacetaldehyde and 1-phenylethane-1,2-diol.
A series of vanadium(V) complexes with chiral tridentate Schiff base ligands, obtained by the single condensation of R(−)-phenylglycinol with carbonyl compounds, were prepared and characterized. The vanadium(V) complexes have the ability to catalyze the oxidation of sulfides [PhSR (R = Me, Bz)] in good yields and enantiomeric excesses. These complexes are also catalytically active in the oxidation of styrene to styrene oxide, benzaldehyde, benzoic acid, phenylacetaldehyde and 1-phenylethane-1,2-diol.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 53, 10 April 2013, Pages 172–178