480-63-7Relevant articles and documents
Pinkus et al.
, p. 2649 (1967)
Electrophilic aromatic substitution of arenes with CO2 mediated by R3SiB(C6F5)4
Konno, Megumi,Chiba, Masafumi,Nemoto, Koji,Hattori, Tetsutaro
, p. 913 - 914,2 (2012)
The FriedelCrafts- type carboxylation of arenes has been achieved by activating CO2 with silylium borates. The reaction exhibits broader substrate applicability than does our previously reported AlX3/R 3SiX-mediated carboxylation.
Effect of cations, substrates and temperature on the microwave-assisted saponification of benzoic and mesitoic esters
Perreux, Laurence,Loupy, Andre
, p. 361 - 368 (2003)
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An efficient chromium(iii)-catalyzed aerobic oxidation of methylarenes in water for the green preparation of corresponding acids
Jiang, Feng,Liu, Shanshan,Wei, Yongge,Yan, Likai,Yu, Han,Zhao, Wenshu
supporting information, p. 12413 - 12418 (2021/09/28)
A highly efficient method to oxidize methylarenes to their corresponding acids with a reusable Cr catalyst was developed. The reaction can be carried out in water with 1 atm oxygen and K2S2O8as cooxidants, proceeds under green and mild conditions, and is suitable for the oxidation of both electron-deficient and electron-rich methylarenes, including heteroaryl methylarenes, even at the gram level. The excellent result, together with its simplicity of operation and the ability to continuously reuse the catalyst, makes this new methodology environmentally benign and cost-effective. The generality of this methodology gives it the potential for use on an industrial scale. Differing from the accepted oxidation mechanism of toluene, GC-MS studies and DFT calculations have revealed that the key benzyl alcohol intermediate is formed under the synergetic effect of the chromium and molybdenum in the Cr catalyst, which can be further oxidized to afford benzaldehyde and finally benzoic acid.
Highly efficient oxidation of alcohols to carboxylic acids using a polyoxometalate-supported chromium(iii) catalyst and CO2
Han, Sheng,Wang, Ying,Wei, Yongge,Wu, Zhikang,Yu, Han
, p. 3150 - 3154 (2020/06/19)
Direct catalytic oxidation of alcohols to carboxylic acids is very attractive, but economical catalysis systems have not yet been well established. Here, we show that a pure inorganic ligand-supported chromium compound, (NH4)3[CrMo6O18(OH)6] (simplified as CrMo6), could be used to effectively promote this type of reaction in the presence of CO2. In almost all cases, oxidation of various alcohols (aromatic and aliphatic) could be achieved under mild conditions, and the corresponding carboxylic acids can be achieved in high yield. The chromium catalyst 1 can be reused several times with little loss of activity. Mechanism study and control reactions demonstrate that the acidification proceeds via the key oxidative immediate of aldehydes.
Preparation method of 2,4,6-trimethyl benzoic acid
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Paragraph 0025-0030, (2019/11/13)
The invention provides a preparation method of 2,4,6-trimethyl benzoic acid. The preparation method of the 2,4,6-trimethyl benzoic acid comprises the following steps that step (1) a Friedel-Crafts reaction is carried out, specifically, 1,3,5-trimethylbenzene is used as a raw material and subjected to the Friedel-Crafts reaction with trichloro-acetic chloride under the action of a catalyst; and step (2) a hydrolysis reaction is carried out, specifically, a product obtained in the step (1) is hydrolyzed under the acidic condition to obtain the 2,4,6-trimethyl benzoic acid. The preparation methodof the 2,4,6-trimethyl benzoic acid has the advantages of high reaction conversion, less pollution, improved yield and purity of the product and the like, and is suitable for industrial production.