1200-06-2Relevant articles and documents
Size-selective catalysts in five functionalized porous coordination polymers with unsaturated zinc centers
Deng, Dongsheng,Guo, Hui,Ji, Baoming,Wang, Weizhou,Ma, Lufang,Luo, Feng
, p. 12611 - 12616 (2017)
The five reported structural isomorphic porous coordination polymers (PCPs) 1-5, namely, [Zn(L)(ip) (1), Zn(L)(aip) (2), Zn(L)(hip) (3), Zn(L)(nip) (4), and Zn(L)(HBTC) (5) (L = N4,N4′-di(pyridine-4-yl)biphenyl-4,4′-dicarboxamide, H2ip = isophthalic acid, H2aip = 5-aminoisophthalic acid, H2hip = 5-hydroxyisophthalic acid, H2nip = 5-nitroisophthalic acid, H3BTC = 1,3,5-benzenetricarboxylic acid)] were used to catalyze the acetylation of phenol. All these heterogeneous catalysts exhibit good catalytic efficiency and size-selectivity toward the acetylation of phenols owing to their unsaturated metal centers, non-coordinated amide, and suitable channel size and shape. Among them, 2 displays the highest catalytic activity and excellent cooperative catalysis due to the presence of basic non-coordinated amide groups.
Structure-activity relationship on human serum paraoxonase (PON1) using substrate analogues and inhibitors
Bargota, Rakesh S.,Akhtar, Mahmoud,Biggadike, Keith,Gani, David,Allemann, Rudolf K.
, p. 1623 - 1626 (2003)
Substrate analogues based on the parent compounds paraoxon and phenyl acetate were tested on human serum paraoxonase (PON1) to explore the active site of the enzyme. Replacement of the nitro group of paraoxon with an amine or hydrogen, as well as electronic changes to the parent compound, converted these analogues into inhibitors. Introduction of either electron-withdrawing or donating groups onto phenyl acetate resulted in reduction in their rate of hydrolysis by PON1.
Proteinase K from the mold Tritirachium album Limber. Specificity and mode of action
Kraus,Femfert
, p. 937 - 947 (1976)
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Use of Molecular Oxygen in the Baeyer-Villiger Oxidation The Influence of Metal Catalysts
Bolm, Carsten,Schlingloff, Gunther,Weickhardt, Konrad
, p. 3405 - 3408 (1993)
Baeyer-Villiger oxidation of ketones using molecular oxygen and benzaldehyde in the absence of metal catalysts afforded lactones in high yields.The catalytic activity of various metal salts has been studied.Key Words: Baeyer-Villiger oxidation, Molecular
Electron-transfer Chain (ETC) Promotion of Aromatic Substitution Reactions. Entry into the SON2 Mechanism via Ipso Radical Attack
Eberson, Lennart,Joensson, Lennart
, p. 133 - 134 (1981)
The oxidative electron-transfer chain mechanism, the SON2 mechanism, is shown to be initiated by benzoyl-oxyl radicals, since 4-fluoroanisole can be converted into a mixture of 4-methoxyphenyl acetate and benzoate (maximum ratio 10:1) in high yield by decomposing benzoyl peroxide in HOAc-KOAc at 78 deg C.
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Friess,Soloway
, p. 3968 (1951)
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Acetylation of phenols in organic solvent catalyzed by a lipase from chromobacterium viscosum
Nicolosi,Piatelli,Sanfilippo
, p. 2477 - 2482 (1992)
Lipase from Chromobacterium viscosum, absorbed on an inert support, was employed as catalyst for the esterification of monohydric phenols in organic solvent, with vinyl acetate as acyl donor. The effect of aromatic ring substitution on the initial rate of transesterification was investigated.
Schutte,Havinga
, p. 2281 (1967)
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Bonner,Gabb
, p. 3291,3292 (1963)
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Satchell
, p. 5404 (1961)
Noncross-linked polystyrene nanoencapsulation of ferric chloride: A novel and reusable heterogeneous macromolecular Lewis acid catalyst toward selective acetylation of alcohols, phenols, amines, and thiols
Alinejad, Sara,Donyapeyma, Ghazaleh,Rahmatpour, Ali
, (2022/01/24)
Ferric chloride has been successfully nanoencapsulated for the first time on a non-cross-linked polystyrene matrix as the shell material via the coacervation technique. The resulting polystyrene nanoencapsulated ferric chloride was used as a novel and rec
Preparation process of 2-bromo-4-hydroxy anisole
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Paragraph 0024; 0026-0027, (2021/02/20)
The invention relates to a preparation process of 2-bromo-4-hydroxy anisole. The preparation process comprises the following steps: reacting 4-hydroxy anisole with acetyl chloride in an organic alkalisolution at low temperature to generate 4-acetyl anisol
Copper-Catalyzed Acetylation of Electron-Rich Phenols and Anilines
Zhang, Jieyu,Ke, Qiumin,Tian, Feitao,Jiang, Bei,Ji, Chang-An,Zhang, Lingling,Yu, Jian,Huang, Dayun,Yan, Guobing
supporting information, p. 726 - 730 (2019/03/26)
An approach has been developed for the copper-catalyzed acetylation of phenols and anilines with potassium thioacetate as an acetylating reagent. Although only electron-rich phenols and anilines are compatible with this protocol, the reaction can provide moderate to high yields under mild conditions. Compared with other acetylating reagents, the current reagent has certain advantages, such as its low cost, easy availability, stability, insensitivity to water or air, and ease of storage.