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Cedeno, D. and Bozell, J.J. (2012) Catalytic Oxidation of Para-Substituted Phenols with Cobalt-Schiff Base Complexes/O2—Selective Conversion of Syringyl and Guaiacyl Lignin Models to Benzoquinones. Tetrahedron Letters, 53, 2380-2383.
http://dx.doi.org/10.1016/j.tetlet.2012.02.093

has been cited by the following article:

• TITLE: Unusual Oxidation Behaviour of Mesoporous Silicates towards Lignin Model Phenolic Monomer

  AUTHORS: Rojalin Sadual, Sushanta K. Badamali, Sudhir E. Dapurkar, Rajesh K. Singh

  KEYWORDS: Lignin, Apocynol, Methoxybenzoquinone, Acetovanillone, Mesoporous Silica

  JOURNAL NAME: World Journal of Nano Science and Engineering, Vol.5 No.3, September 8, 2015

  ABSTRACT: Oxidation of the lignin model monomer apocynol, 1-(4-hydroxy-3-methoxyphenoxy)-ethanol catalysed by mesoporous silica catalysts i.e. MCM-41, MCM-48, SBA-15 using H2O2 as an oxidant has been studied. Selectively, 2-methoxybenzoquinone was obtained along with acetovanillone. Such unprecedented oxidation behaviour of these metal free siliceous catalysts is attributed to the polar internal surface, high surface area as well as the pore architecture. On the other hand, the studied reaction was found to be non-selective when a commercial grade mesoporous silica i.e. Silica-5 was used as catalyst for comparison. Among the various silica catalysts studied, MCMs gave highest conversion and selectivity towards 2-methoxybenzoquinone under very mild reaction conditions.