100-19-6Relevant articles and documents
Cubic CuxZrO100-x as an efficient and selective catalyst for the oxidation of aromatics active methyl, alcohol, and amine groups
Bankar, Balasaheb D.,Advani, Jacky H.,Biradar, Ankush V.
, (2021)
The local structure of a supported active metal plays a vital role in determining the desired product's selectivity in heterogeneous catalysis. Herein, we have developed a simple protocol for the synthesis of Cu doped on cubic ZrO2 mixed metal oxide catalysts and used it for the selective oxidation of various functional groups. The catalyst was synthesized by varying the wt.% of Cu (1–20%) on ZrO2 by co-precipitation, followed by hydrothermal treatment. The X-ray diffraction pattern of the catalysts confirmed the formation of the cubic phase of ZrO2, and the growth of CuO occurred along the (1 1 1) plane. The microscopy analysis revealed the uniform distribution of Cu on the ZrO2 surface, while XPS analysis confirmed the presence of copper in the +2 oxidation state. The synthesized catalyst with 2 wt% loading of Cu on ZrO2 showed excellent liquid-phase oxidation properties and gave good to best conversion of active methyl groups, alcohols, and amines with high selectivities to corresponding ketones, aldehydes, and amides, respectively, under milder reaction conditions. Furthermore, the synthesized catalyst showed a broader substrate scope for the various substituted active methyl groups, alcohols, and amines with good conversion and selectivity.
Facile and efficient method for deprotection of 1,3-oxathiolanes with N,N′-dibromo-N,N′-1,2-ethanediylbis(p-toluenesulphonamide)
Ghorbani-Vaghei, Ramin,Khazaei, Ardeshir
, p. 1787 - 1791 (2004)
Aliphatic and aromatic 1,3-oxathiolanes are readily oxidized to aldehydes and ketones in good yields under mild conditions by N,N′-dibromo-N, N′-1,2-ethanediylbis(p-toluenesulphonamide) [BNBTS].
Oxidation of oximes to ketones with zeolite supported permanganate
Jadhav,Wadgaonkar,Joshi,Salunkhe
, p. 1989 - 1995 (1999)
A variety of aldoximes and ketoximes are oxidised to corresponding aldehydes and ketones in excellent yields by zeolite supported permanganate.
Heteropoly acid-based supported ionic liquid-phase catalyst for the selective oxidation of alcohols
Bordoloi, Ankur,Sahoo, Suman,Lefebvre,Halligudi
, p. 232 - 239 (2008)
A supported ionic liquid strategy has been applied for the immobilization of a heteropolyacid, molybdovanadophosphoric acid, onto ionic liquid-modified mesoporous silica SBA-15. The immobilized catalyst demonstrated high activity in the aerobic oxidation of primary and secondary alcohols to aldehydes and ketones, respectively. No overoxidation of the primary alcohols to carboxylic acids was observed. Secondary alcohols were chemoselectively oxidized to ketones in the presence of primary alcohol, hetero atom, and allyl groups. This catalyst could be recycled five times without obvious loss of activity.
Polyoxometalate-Incorporated Framework as a Heterogeneous Catalyst for Selective Oxidation of C-H Bonds of Alkylbenzenes
Hu, Xin,Ma, Pengtao,Niu, Jingyang,Wang, Hui,Wang, Jingping,Wang, Quanzhong,Wang, Yingyue,Xu, Baijie
, p. 7753 - 7761 (2021)
Developing new catalysts for highly efficient and selective oxidation of saturated C-H bonds is significant due to their thermodynamic strength. Via incorporation of PW12O403-, pyridine-2,5-dicarboxylic acids (pydc), and Fe(III) ions into one framework, a new polyoxometalate-based metal-organic framework, [HFe4O2(H2O)4(pydc)3PW12O40]·10.5H2O (FeW-PYDC), was successfully prepared by a hydrothermal method. Interestingly, FeW-PYDC features a three-dimensional porous structure with {Fe4O2} interconnecting with PW12O403- units. FeW-PYDC displayed excellent performance in the selective oxidation of C-H bonds of alkylbenzenes with high conversion (95.7%) and selectivity (96.6%). As an effective heterogeneous catalyst, FeW-PYDC demonstrates good reusability and structural stability.
Methylammonium chlorochromate adsorbed on alumina: A convenient and efficient reagent for cleavage of carbon-nitrogen double bonds under non- aqueous condition
Zhang, Gui-Sheng,Yang, De-Hong,Chen, Mi-Feng,Cai, Kun
, p. 607 - 611 (1998)
Methylammonium chlorochromate adsorbed on alumina is an easily prepared and stable reagent. With this reagent oximes and p-nitrophenylhydrazones are converted to their corresponding carbonyl compounds in good yields.
Organotellurium-catalyzed oxidative deoximation reactions using visible-light as the precise driving energy
Deng, Xin,Qian, Rongrong,Zhou, Hongwei,Yu, Lei
, p. 1029 - 1032 (2021)
Irradiated by visible light, the recyclable (PhTe)2-catalyzed oxidative deoximation reaction could occur under mild conditions. In comparison with the thermo reaction, the method employed reduced catalyst loading (1 mol% vs. 2.5 mol%), but afforded elevated product yields with expanded substrate scope. This work demonstrated that for the organotellurium-catalyzed reactions, visible light might be an even more precise driving energy than heating because it could break the Te–Te bond accurately to generate the active free radical catalytic intermediates without damaging the fragile substituents (e.g., heterocycles) of substrates. The use of O2 instead of explosive H2O2 as oxidant affords safer reaction conditions from the large-scale application viewpoint.
Deprotection of dithioacetals with 30% hydrogen peroxide catalyzed by tantalum(V) chloride-sodium iodide or niobium(V) chloride-sodium iodide
Kirihara, Masayuki,Noguchi, Takuya,Okajima, Nobuhiro,Naito, Sayuri,Ishizuka, Yuki,Harano, Aiko,Tsukiji, Hiroyuki,Takizawa, Ryu
, p. 1515 - 1520 (2012)
The reaction of dithioacetals with 30% hydrogen peroxide in the presence of catalytic amounts of tantalum(V) and iodide ion effectively produced carbonyl compounds in high yields. Dithioacetals also can be deprotected using the niobium(V) catalyzed oxidation of iodide ion by hydrogen peroxide under mild conditions.
An efficient selective oxidation of alcohols with iron zirconium phosphate under solvent-free conditions
Hajipour, Abdol Reza,Karimi, Hirbod,Masti, Amir
, p. 413 - 423 (2016)
Iron zirconium phosphate nanoparticles have been used as an efficient catalyst for the selective oxidation of a wide range of alcohols to their corresponding ketones or aldehydes using H2O2 as an oxidizing agent without any organic solvent or additive. The steric factors associated with the substrates had a significant influence on the reaction conditions. The results showed that this method can be applied for chemoselective oxidation of benzyl alcohols in the presence of aliphatic alcohols. The catalyst used in the current study was characterized by ICP-OES, XRD, N2 adsorption-desorption, NH3-TPD, Py-FTIR, SEM, and TEM.
A mild and versatile method for the oxidative cleavage of oximes and tosylhydrazones to carbonyl compounds
Bose, D. Subhas,Srinivas
, p. 977 - 978 (1998)
1-Hydroxy-1,2-benziodoxol-3(1H)-one 1-oxide (IBX) was found to be an efficient and selective reagent for the mild oxidative cleavage of the C=N of oximes and tosylhydrazones to yield their corresponding carbonyl compounds rapidly at room temperature in high yields.
