Vanadium Aminophenolate Complexes and Their Catalytic Activity in Aerobic and H2O2‐Mediated Oxidation Reactions

Kerton, Francesca M. and Elkurtehi, Ali I. and Walsh, Andrew G. and Dawe, Louise N. (2016) Vanadium Aminophenolate Complexes and Their Catalytic Activity in Aerobic and H2O2‐Mediated Oxidation Reactions. European Journal of Inorganic Chemistry, 2016 (19). pp. 3123-3130. ISSN 1099-0682

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Abstract

Vanadium compounds supported by tetradentate amino‐bis(phenolate) ligands, [VO(OMe)(O2NOBuMeMeth)] (1), [VO(OMe)(ON2OBuMe)] (2), [VO(OMe)(O2NNBuBuPy)] (3), and [VO(OMe)(O2NOBuBuFurf)] (4) [where (O2NOBuMeMeth) = MeOCH2CH2N(CH2ArOH)2, Ar = 3,5‐C6H2‐Me, tBu; (ON2OBuMe) = HOArCH2NMeCH2CH2NMeCH2ArOH, Ar = 3,5‐C6H2‐Me, tBu; (O2NNBuBuPy) = C5H4NCH2N(CH2ArOH)2, Ar = 3,5‐C6H2‐tBu2; (O2NOBuBuFurf) = C4H3OCH2N(CH2ArOH)2, Ar = 3,5‐C6H2‐tBu2] were synthesized and characterized by NMR spectroscopy, MALDI‐TOF mass spectrometry and UV/Vis data. The catalytic activity of 1–4 as homogeneous catalysts in the aerobic oxidation of 4‐methoxybenzyl alcohol and 1,2‐diphenyl‐2‐methoxyethanol was explored. 1 and 2 showed moderately superior activity compared with 3 and 4, which might be due to increased stability of these complexes. 1–4 showed limited reactivity in H2O2‐mediated oxidation of diphenyl ether and benzyl phenyl ether.

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