Abstract
The [VO(acac)2]/Schiff base [R-2-(N-3,5-di-tert-butylsalicylidene)amino-2-phenyl-1-ethanol, S-2-(N-3,5-di-tert-butylsalicylidene)amino-3,3-dimethyl-1-butanol, S-2-(N-3,5-di-tert-butylsalicylidene)amino-3-methyl-1-butanol, or R-2-(N-3,5-di-tert-butylsalicylidene)amino-3-phenyl-1-propanol]/H2O2 catalytic systems for the asymmetric oxidation of sulfides and the [VO(acac)2]/(3bR,4aR)-2-(3,4,4-trimethyl-3b,4,4a,5-tetrahydrocyclopropa[3,4]cyclopenta[1,2-c]pyrazol-1-yl)ethanol/tert-butyl hydroperoxide/ TBHP and VO(OAlkyl)3/[2,2]paracyclophane-4-carboxylic acid N-(1,1-dimethylethyl)-N-hydroxamide/TBHP catalytic systems for the asymmetric epoxidation of allylic alcohols were studied using 13C, 51V, and 17O NMR spectroscopy. The key intermediates of these systems (peroxo and alkylperoxo complexes of vanadium(V)) were detected, their structures in solution were studied, and the reactivity was evaluated.
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Bryliakov, K.P., Talsi, E.P. Intermediates of Asymmetric Oxidation Processes Catalyzed by Vanadium(V) Complexes. Kinetics and Catalysis 44, 334–346 (2003). https://doi.org/10.1023/A:1024490817847
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DOI: https://doi.org/10.1023/A:1024490817847