29223-92-5Relevant articles and documents
Oxidative lactonization of diethylene glycol to high-value-added product 1,4-dioxan-2-one promoted by a highly efficacious and selective catalyst ZnO-ZnCr2O4
Cai, Menglu,Wang, Xiaozhong,Chen, Yingqi,Dai, Liyan
, (2020)
For the first time, the desired product 1,4-dioxan-2-one (PDO) was successfully synthesized via the oxidative lactonization of diethylene glycol (DEG) under mild conditions. After screening several catalysts (M-Cr-O), we found ZnO-ZnCr2O4 (Zn-Cr-O) catalyst exhibited excellent catalytic performance and this chemical transformation obtained moderate to excellent selectivity (96.22%) and conversion (81.95%) within a 4 h reaction time. Subsequently, the morphology of calcined M-Cr-O was investigated by FT-IR, XRD, FESEM, TEM, and N2 adsorption-desorption tests for further study on catalytic performances. The strength and quantity of acid and base sites over Zn-Cr-O were also detected by NH3-TPD and CO2-TPD, and it was worth noting that the acid/base sites over ZnO-ZnCr2O4 (Zn-Cr-O) catalyst could promote this catalytic process well. Recycle studies demonstrated exceptional stability and recyclability of the prepared catalyst without significant efficiency and selectivity loss after 10 consecutive cycles.
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Cort,Francis
, p. 2799 (1964)
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Method for preparing P-dioxanone from diethylene glycol and catalyst thereof
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Paragraph 0047-0075, (2021/05/01)
The invention relates to the technical field of organic catalytic synthesis, in particular to a method for preparing p-dioxanone from diethylene glycol and a catalyst thereof. The method comprise the following steps of reacting the diethylene glycol under the action of the catalyst to generate the p-dioxanone, wherein the catalyst is a supported metal catalyst in which an active metal component is supported on a hydroxyapatite carrier. The method can be carried out in a green solvent or under a solvent-free condition, and p-dioxanone can be prepared from diethylene glycol at a conversion rate of up to 100%; moreover, the reaction process for preparing p-dioxanone from diethylene glycol is simple, the equipment is simple, the operation is simple and convenient, and the reaction conditions are very mild; meanwhile, the preparation process of the catalyst is simple, the cost is low, large-scale production can be realized, the thermal stability of the catalyst is high, and the recycling performance is good; reaction products, catalysts and solvent systems are easy to separate, reaction period is short, and the method is suitable for industrial production.
Flavin Nitroalkane Oxidase Mimics Compatibility with NOx/TEMPO Catalysis: Aerobic Oxidization of Alcohols, Diols, and Ethers
Thapa, Pawan,Hazoor, Shan,Chouhan, Bikash,Vuong, Thanh Thuy,Foss, Frank W.
, p. 9096 - 9105 (2020/08/14)
Biomimetic flavin organocatalysts oxidize nitromethane to formaldehyde and NOx - providing a relatively nontoxic, noncaustic, and inexpensive source for catalytic NO2 for aerobic TEMPO oxidations of alcohols, diols, and ethers. Alcohols were oxidized to aldehydes or ketones, cyclic ethers to esters, and terminal diols to lactones. In situ trapping of NOx and formaldehyde suggest an oxidative Nef process reminiscent of flavoprotein nitroalkane oxidase reactivity, which is achieved by relatively stable 1,10-bridged flavins. The metal-free flavin/NOx/TEMPO catalytic cycles are uniquely compatible, especially compared to other Nef and NOx-generating processes, and reveal selectivity over flavin-catalyzed sulfoxide formation. Aliphatic ethers were oxidized by this method, as demonstrated by the conversion of (-)-ambroxide to (+)-sclareolide.