131-56-6Relevant articles and documents
Efficient microwave-assisted direct C-benzoylation of phenols and naphthols with benzoic acid catalyzed by bismuth triflate under solvent-free or ionic liquid conditions
Tran, Phuong Hoang,Phung, Huy Quang,Duong, Minh Nhat,Pham-Tran, Nguyen-Nguyen
, p. 1558 - 1563 (2017)
An efficient and simple route for the synthesis of ortho-hydroxyaryl ketones has been developed. The microwave-assisted direct C-benzoylation of phenols and naphthols in the presence of metal triflates afforded the corresponding ortho-hydroxyaryl ketones in moderate to excellent yields. Bismuth triflate showed the best catalytic performance compared to other metal triflates. The protocol has advantages including short reaction times, high chemoselectivity towards C-acylation, and simple work-up. Additionally, bismuth triflate can be easily recovered and reused several times without significant loss of catalytic performance.
Novel process for preparing sun-screening agent 2-hydroxy-4-n-octyloxy benzophenone
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Paragraph 0092-0096, (2021/02/06)
The invention discloses a novel process for preparing a sun-screening agent 2-hydroxy-4-n-octyloxy benzophenone. According to the process, 2,4-dihydroxy benzophenone is prepared, and 2,4-dihydroxy benzophenone and 1-chloro-n-octane are used as raw materials, wherein the prepared 2,4-dihydroxy benzophenone is simple in method, has no need of posttreatment and can be directly used as a reaction rawmaterial for subsequent reaction, and the energy consumption is reduced from the source; 1-chloro-n-octane is taken as an alkylation reagent, inorganic base is taken as a catalyst, solvents are addedfor reaction, and the yield of the obtained product 2-hydroxy-4-octyloxybenzophenone is high and can reach 90% or above. According to the method, the raw material cost is reduced, the problem of industrial wastewater at present is solved, in addition, the whole process is mild in condition, few in three wastes, high in yield and good in product quality, the use requirements of the cosmetic industry are met, the technological process is simple to operate and easy to realize, the intermediate reaction process is simple and easy to control, and industrial production can be realized.
Clean production method of 2,4-dihydroxy benzophenone
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Paragraph 0035-0052, (2021/01/15)
The invention discloses a clean production method of 2,4-dihydroxy benzophenone, wherein the method comprises the steps: by using trichlorotoluene and resorcinol as initial raw materials, reacting ina water/ethanol system to generate 2,4-dihydroxy benzophenone, and concentrating, alkalizing, decolorizing and acidifying a mother solution to implement zero discharge of wastewater. According to themethod, cheap and easily available trichlorotoluene and resorcinol are used as starting materials, the production method is simple in process, green and environment-friendly, the product yield and purity are relatively high, and the method has a wide industrial application prospect.