585-34-2Relevant articles and documents
Direct Oxygenation of Benzene and Its Analogues into Phenols Catalyzed by Oxovanadium(IV) Complex with Combined Use of Molecular Oxygen and Aldehyde
Hata, Eiichiro,Takai, Toshihiro,Yamada, Tohru,Mukaiyama, Teruaki
, p. 1849 - 1852 (1994)
In the presence of a catalytic amount of oxovanadium(IV) complexes coordinated by 1,3-diketone-type ligands, benzene and its analogues are directly oxygenated into phenols by combined use of molecular oxygen and crotonaldehyde at room temperature.
Increasing the steric hindrance around the catalytic core of a self-assembled imine-based non-heme iron catalyst for C-H oxidation
Frateloreto, Federico,Capocasa, Giorgio,Olivo, Giorgio,Abdel Hady, Karim,Sappino, Carla,Di Berto Mancini, Marika,Levi Mortera, Stefano,Lanzalunga, Osvaldo,Di Stefano, Stefano
, p. 537 - 542 (2021/02/09)
Sterically hindered imine-based non-heme complexes4and5rapidly self-assemble in acetonitrile at 25 °C, when the corresponding building blocks are added in solution in the proper ratios. Such complexes are investigated as catalysts for the H2O2oxidation of a series of substrates in order to ascertain the role and the importance of the ligand steric hindrance on the action of the catalytic core1, previously shown to be an efficient catalyst for aliphatic and aromatic C-H bond oxidation. The study reveals a modest dependence of the output of the oxidation reactions on the presence of bulky substituents in the backbone of the catalyst, both in terms of activity and selectivity. This result supports a previously hypothesized catalytic mechanism, which is based on the hemi-lability of the metal complex. In the active form of the catalyst, one of the pyridine arms temporarily leaves the iron centre, freeing up a lot of room for the access of the substrate.
Green preparation process of M-tert-butylphenol
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Paragraph 0023; 0025; 0027; 0029; 0030; 0032, (2020/04/02)
The invention discloses a preparation process of m-tert-butylphenol. The method includes the steps of: (1) adopting phenol and tert-butyl chloride as the raw materials, taking acidic clay and concentrated sulfuric acid as the catalyst, carrying out alkylation reaction to obtain the main product m-tert-butylphenol and the byproduct p-tert-butylphenol by one step, and performing separation; and (2)taking unreacted phenol and the p-tert-butylphenol by-product obtained in the step (1) as the raw materials, and taking acidic clay and aluminum trichloride as the catalyst, and carrying out rearrangement reaction to obtain m-tert-butylphenol in one step. Compared with the prior art, the preparation process of m-tert-butylphenol provided by the invention has the advantages of cheap and easily available raw materials, simple technology, good atom economy, greenness and environmental protection, is suitability for industrial production, and has important practical significance for improvement ofthe economic and social benefits of the tert-butylphenolation industry.