{"title":"Efficient allylic oxidation of cyclohexene catalyzed by Ti-MCM-41 using H2O2 as oxidant","authors":"","doi":"10.1016/j.micromeso.2024.113263","DOIUrl":null,"url":null,"abstract":"<div><p>2-cyclohexen-1-ol and 2-cyclohexen-1-one are very important chemical raw materials, and it is a challenge to develop an environmental and efficient synthesis route with titanium-containing catalyst to obtain high yield of allylic oxidation product. Herein, we present an intensive study on the allylic oxidation of cyclohexene over titanosilicates/H<sub>2</sub>O<sub>2</sub> system. Ti-MCM-41 is found as an efficient catalyst. The reaction parameters, including cyclohexene/H<sub>2</sub>O<sub>2</sub> molar ratios, solvent, catalyst amount, titanium content, reaction temperature and reaction time, were studied in detail. And a high cyclohexene conversion (∼20.2 %) and total selectivity of 2-cyclohexen-1-one and 2-cyclohexen-1-ol (∼90.0 %) was achieved under optimized reaction conditions. Further the allylic oxidation of cyclohexene proceeds a radical mechanism as demonstrated by the addition of radical scavenger BHT. This will make it possible for the highly selective green generation of enols and ketenes.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387181124002853","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
2-cyclohexen-1-ol and 2-cyclohexen-1-one are very important chemical raw materials, and it is a challenge to develop an environmental and efficient synthesis route with titanium-containing catalyst to obtain high yield of allylic oxidation product. Herein, we present an intensive study on the allylic oxidation of cyclohexene over titanosilicates/H2O2 system. Ti-MCM-41 is found as an efficient catalyst. The reaction parameters, including cyclohexene/H2O2 molar ratios, solvent, catalyst amount, titanium content, reaction temperature and reaction time, were studied in detail. And a high cyclohexene conversion (∼20.2 %) and total selectivity of 2-cyclohexen-1-one and 2-cyclohexen-1-ol (∼90.0 %) was achieved under optimized reaction conditions. Further the allylic oxidation of cyclohexene proceeds a radical mechanism as demonstrated by the addition of radical scavenger BHT. This will make it possible for the highly selective green generation of enols and ketenes.
期刊介绍：
Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal.
Topics which are particularly of interest include:
All aspects of natural microporous and mesoporous solids
The synthesis of crystalline or amorphous porous materials
The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic
The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions
All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials
Adsorption (and other separation techniques) using microporous or mesoporous adsorbents
Catalysis by microporous and mesoporous materials
Host/guest interactions
Theoretical chemistry and modelling of host/guest interactions
All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.
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