Aerobic Oxidation Reactions Catalyzed by Vanadium Complexes of Bis(Phenolate) Ligands
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https://figshare.com/articles/dataset/Aerobic_Oxidation_Reactions_Catalyzed_by_Vanadium_Complexes_of_Bis_Phenolate_Ligands/2509489
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资源简介：
Vanadium(V) complexes of the tridentate bis(phenolate)pyridine
ligand H2BPP (H2BPP = 2,6-(HOC6H2-2,4-tBu2)2NC5H3) and the bis(phenolate)amine ligand H2BPA (H2BPA = N,N-bis(2-hydroxy-4,5-dimethylbenzyl)propylamine)
have been synthesized and characterized. The ability of the complexes
to mediate the oxidative C–C bond cleavage of pinacol was tested.
Reaction of the complex (BPP)VV(O)(OiPr) (4) with pinacol afforded the monomeric vanadium(IV) product
(BPP)VIV(O)(HOiPr) (6) and acetone.
Vanadium(IV) complex 6 was oxidized rapidly by air at
room temperature in the presence of NEt3, yielding the
vanadium(V) cis-dioxo complex [(BPP)VV(O)2]HNEt3. Complex (BPA)VV(O)(OiPr) (5) reacted with pinacol at room temperature,
to afford acetone and the vanadium(IV) dimer [(BPA)VIV(O)(HOiPr)]2. Complexes 4 and 5 were evaluated as catalysts for the aerobic oxidation of 4-methoxybenzyl
alcohol and arylglycerol β-aryl ether lignin model compounds.
Although both 4 and 5 catalyzed the aerobic
oxidation of 4-methoxybenzyl alcohol, complex 4 was found
to be a more active and robust catalyst for oxidation of the lignin
model compounds. The catalytic activities and selectivities of the
bis(phenolate) complexes are compared to previously reported catalysts.
创建时间：
2012-07-02
