1446-34-0Relevant articles and documents
Multiple oxo-vanadium schiff base containing cyclotriphosphazene as a robust heterogeneous catalyst for regioselective oxidation of naphthols and phenols to quinones
Khatri, Praveen K.,Jain, Suman L.
, p. 1020 - 1025 (2012/10/29)
Grafting of multiple oxo-vanadium Schiff base moieties to cyclotriphosphazene provided an efficient and recyclable heterogeneous catalyst for the regioselective oxidation of naphthols and phenols to quinones by using tbutylhydroperoxide as oxidant. One of the main advantages of the developed catalyst was the presence of multiple oxovanadium moieties in close proximity which made the developed catalyst more active as compared to its homogeneous oxo-vanadium Schiff base. After the reaction, the catalyst was easily recovered from the reaction mixture by simple filtration and reused for five runs without loss in activity.
Electrocatalytic Oxidative Coupling Reaction of Naphthols and Naphthol Ethers on a TEMPO Modified Graphite Felt Electrode
Kashiwagi, Yoshitomo,Ono, Hiroaki,Osa, Tetsuo
, p. 81 - 84 (2007/10/02)
2-Naphthol and 2-methoxynaphthalene were quantitatively oxidized to the corresponding 1,1'-binaphthyls in more than 90percent current efficiency on a graphite felt electrode coated with a thin poly(acrylic acid) layer immobilizing 4-amino-2,2,6,6-tetramethylpiperidinyl-1-oxyl (4-amino-TEMPO). 1-Naphthol and 1-methoxynaphthalene were also completely converted to the predicted 1,1'-, 1,2'-, and 2,2'- positioned coupling products.The reaction proceeds via electrocatalytic oxidation of the modified-TEMPO species.The electrode was not inactivated during electrolysis and could be used repeatedly.
