935-92-2Relevant articles and documents
SHIFF'S BASES IN THE POLYMER MATRIX. COMMUNICATION 2. STRUCTURE AND CATALYTIC PROPERTIES OF Cu(II) COMPLEXES WITH AROMATIC AND HETEROCYCLIC AZOMETHINES IN THE STYRENE-DIVINYLBENZENE COPOLYMER IN OXIDATION OF 2,3,6-TRIMETHYLPHENOL
Skobeleva, V. D.,Men'shikov, S. Yu.,Molochnikov, L. S.,Kolenko, I. P.,Novoselova, A. A.,et al.
, p. 1598 - 1601 (1987)
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Titanium dioxide xerogel modified with powder cellulose in oxidation of trimethylhydroquinone
Shishmakov,Mikushina,Valova,Koryakova,Petrov
, p. 2107 - 2110 (2007)
A procedure was developed for modification of titanium dioxide xerogel by addition of powder cellulose in the stage preceding hydrolysis of tetramethoxytitanium. The resulting catalytic systems based on the new material were studied in a model liquid-phase catalytic process of oxidative dehydrogenation of trimethylhydroquinone with atmospheric oxygen.
An efficient synthesis of 2,3,5-trimethylbenzoquinone by metal-free oxidation of 1,2,4-trimethylbenzene
Yerramreddy, Thirupathi Reddy,Pelton, Egan,Dawson, Karl A,Yiannikouris, Alexandros
, p. 565 - 568 (2019)
The oxidation of 1,2,4-trimethylbenzene with phthaloyl peroxide has been investigated under solvent-free and optimized conditions. 2,3,5-Trimethylbenzoquinone was obtained with great purity in 92% yield at 95% conversion of 1,2,4-trimethylbenzene at 120°C for 2.5 h under solvent-free conditions. The important factors such as the efficiency of the different cyclic acid anhydrides or carboxylic acid peroxides, the concentration of phthalic anhydride and 30% H2O2, the reaction time, the effect of solvent system, and the reaction temperature have been studied. An important advantage of this oxidizing system, aside from the organic solvent-free conditions, is that it is non-toxic, eco-friendly, and inexpensive. In addition, this methodology will be of great use in the preparation of commercially valuable benzoquinones from the corresponding aromatic compounds.
Hierarchical mesoporous TS-1 zeolite: A highly active and extraordinarily stable catalyst for the selective oxidation of 2,3,6-trimethylphenol
Zhou, Jian,Hua, Zile,Cui, Xiangzhi,Ye, Zhengqing,Cui, Fangming,Shi, Jianlin
, p. 4994 - 4996 (2010)
We report the synthesis of a new hierarchical mesoporous TS-1 type zeolite by a simple steam-assisted crystallization method. This novel product exhibits high catalytic activity and a strongly prolonged lifetime in the selective oxidation of 2,3,6-trimethylphenol to trimethyl-p-benzoquinone.
Efficient oxidation of 2,3,6-trimethyl phenol using non- exchanged and H+ exchanged manganese oxide octahedral molecular sieves (K-OMS-2 and H-K-OMS-2) as catalysts
Opembe, Naftali N.,King'Ondu, Cecil K.,Suib, Steven L.
, p. 427 - 432 (2012)
A new and efficient oxidation process of 2,3,6- trimethyl phenol to 2,3,6-trimethyl benzoquinone (TMQ) is reported forthwith using non-exchanged and H+-exchanged manganese oxide octahedral molecular sieves (K-OMS-2 and H-K-OMS-2) as benign catalysts. The oxidation reaction is efficiently carried out using TBHP as oxidant and with catalytic amounts of OMS-2 achieving >95% conversion with excellent selectivity (~99%) to TMQ in 30 min. Springer Science+Business Media, LLC 2012.
CATALYTICAL PROPERTIES OF POLYVANADOMOLYBDIC ACIDS IN OXIDATION OF 1,2,4-TRIMETHYLBENZENE BY PERACETIC ACID
Petrov, L. A.,Lobanova, N. P.,Volkov, V. L:,Zakharova, G. S.,Kolenko, I. P.,Buldakova, L. Yu.
, p. 1806 - 1808 (1989)
Polyvanadomolybdic acids catalyze the process of peracid oxidation of 1,2,4-trimethylbenzene.The selectivity with respect to 2,3,5-trimethyl-1,4-benzoquinone increases with increasing degree of replacement of vanadium atoms in the PVMA by molybdenum; this is related to increased stability of the intermediate peroxides of the heteropolyvanadates.
Oxidative dehydrogenation of 2,3,5-trimethyl-1,4-hydroquinone in the presence of titanium dioxide hydrogel
Kharchuk,Buldakova,Shishmakov,Kuznetsova,Kovaleva,Koryakova,Molochnikov,Yanchenko,Petrov
, p. 101 - 104 (2004)
Liquid-phase oxidative dehydrogenation of 2,3,5-trimethyl-1,4-hydroquinone in the presence of titanium dioxide hydrogel was studied by a kinetic method. Associative interactions between the substrate, oxidant, and gel were detected by voltammetry and ESR and IR spectroscopy.
Kornfeld,Weissberger
, p. 360 (1939)
PHOTOOXIDATION OF 2,3,5-TRIMETHYLPHENOL
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Page/Page column 14-17, (2021/11/26)
The present invention relates to the photooxidation of 2,3,5-trimethyl- phenol to yield 2,3,5-trimethylbenzoquinone using methylene blue as photo- sensitizer in a solvent mixture of water and alcohols using light of the high wavelength range of the visible spectrum.
Oxidative Dearomatization of Phenols and Polycyclic Aromatics with Hydrogen Peroxide Triggered by Heterogeneous Sulfonic Acids
Pancrazzi, Francesco,Maestri, Giovanni,Maggi, Raimondo,Viscardi, Rosanna
supporting information, p. 5407 - 5414 (2021/10/25)
We report herein a method for the oxidative dearomatization of phenols and bare polycyclic arenes into the corresponding quinoid derivatives using hydrogen peroxide. The reaction is catalyzed by sulfonic acids and best results were achieved using heterogenized species. The best results using phenols were achieved using a hybrid material, namely a perfluorinated polymer functionalized with sulfonic acid groups supported on silica. The dearomatization of polycyclic aromatic hydrocarbons performed better using the polymeric acid catalyst. These methods operate under mild conditions, using mild and benign oxidants and thus minimizing the formation of waste.