553-97-9Relevant articles and documents
Emitters of chemiluminescence occurring during autoxidation of substituted hydroquinones in water
Kalinichenko,Kalinichenko,Odaryuk,Kanibolotskaya,Shendrik
, p. 1476 - 1480 (2017)
A mathematical processing method for determination of spectral parameters of chemiluminescence emitters during the autoxidation of phenolic compounds in aqueous-alkaline media has been developed. The presence of a single luminescence emitter (the corresponding p-benzoquinone in the triplet state) has been demonstrated in the hydroquinone–oxygen–water system. The emitters spectra have been obtained.
Novel production process of 2-methyl-1, 4-naphthoquinone
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Paragraph 0020; 0024; 0027; 0030, (2020/10/04)
The invention relates to the technical field of fine chemical synthesis, in particular to a novel production process of 2-methyl-1, 4-naphthoquinone. The synthesis method comprises the following stepsof: 1, oxidizing o-cresol to synthesize o-methylbenzoquinone; 2, carrying out an addition reaction on the obtained o-methylbenzoquinone and butadiene to obtain 2-methyl-1, 4-tetrahydronaphthoquinone;and 3, taking the 2-methyl-1, 4-tetrahydronaphthoquinone, and oxidizing the 2-methyl-1, 4-tetrahydronaphthoquinone with DMSO under the action of a catalyst to obtain the 2-methyl-1, 4-naphthoquinone.According to the method, the 2-methyl-1, 4-naphthoquinone product is obtained through three-step reaction by taking o-cresol as an initial raw material, the reaction raw materials are easy to obtain,the operation is simple and convenient, the method is suitable for industrial production, the synthesis cost of vitamin K3 is reduced, and the productivity and the quality are improved. The problemsthat an existing 2-methyl-1, 4-naphthoquinone synthesis process is low in yield, a used catalyst is expensive, the production cost is high, many byproducts are produced, and heavy metal ion pollutioncannot be fundamentally avoided when an inorganic salt oxidizing agent or a metal-containing catalyst is applied are solved.
Synthesis and characterization of a novel ruthenium(ii) trisbipyridine complex magnetic nanocomposite for the selective oxidation of phenols
Fei, Zhengxin,Chen, Feng,Zhong, Mingqiang,Qiu, Jianping,Li, Weidong,Sadeghzadeh, Seyed Mohsen
, p. 28078 - 28088 (2019/09/30)
Anchoring ruthenium(ii) trisbipyridine complex [Ru(Bpy)3]2+ into a magnetic dendritic fibrous silica nanostructure produces an unprecedented strong nanocatalyst, FeNi3/DFNS/[Ru(Bpy)3]2+. Impressive oxidation of phenols to 1,4-benzoquinones catalyzed by FeNi3/DFNS/[Ru(Bpy)3]2+ is obtained in acetonitrile and water solution with molecular dioxygen as oxidant. Exclusively, apparently inert phenols such as phenol itself and mono-alkyl-substituted phenols are impressively oxidized to produce 1,4-benzoquinones through activation of the C-H bond in the position para to the carbon-oxygen bond under mild conditions. In addition, the production of industrially significant quinones that are known intermediates for vitamin combinations is investigated and studied FeNi3/DFNS/[Ru(Bpy)3]2+ magnetic nanoparticles were produced, and their properties were investigated by AFM, FTIR, XRD, TGA, SEM, TEM, and VSM.